Abstract

It is indicated by single-atom simulations that the intensity of a single isolated X-ray pulse in the 3.4 to 4 keV region from an 8 micron laser driven high harmonic generation can be increased by more than two orders of magnitude when a single-cycle pulse centered at 800 nm is added. The ionization probability of a helium atom by the two-pulse field is set to $4.56 \times {10^{ - 5}}$, which is needed for balancing the index of refraction of free electrons with that of neutral helium atoms to achieve phase matching.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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    [Crossref]
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    [Crossref]

2018 (2)

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

L. Feng and Y. Li, “High-intensity isolated attosecond X-ray pulse generation by using low-intensity ultraviolet–mid-infrared laser beam,” Eur. Phys. J. D 72(9), 167 (2018).
[Crossref]

2017 (1)

Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

2016 (1)

2014 (1)

M. Chini, K. Zhao, and Z. Chang, “The generation, characterization and applications of broadband isolated attosecond pulses,” Nat. Photonics 8(3), 178–186 (2014).
[Crossref]

2013 (1)

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

2012 (2)

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

H. Du, L. Luo, X. Wang, and B. Hu, “Attosecond ionization control for broadband supercontinuum generation using a weak 400-nm few-cycle controlling pulse,” Opt. Express 20(24), 27226–27241 (2012).
[Crossref]

2011 (1)

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

2010 (1)

G. Orlando, P. Corso, E. Fiordilino, and F. Persico, “A three-colour scheme to generate isolated attosecond pulses,” J. Phys. B: At., Mol. Opt. Phys. 43(2), 025602 (2010).
[Crossref]

2009 (4)

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

F. Krausz and M. Ivanov, “Attosecond physics,” Rev. Mod. Phys. 81(1), 163–234 (2009).
[Crossref]

H. Xiong, H. Xu, Y. Fu, J. Yao, B. Zeng, W. Chu, Y. Cheng, Z. Xu, E. J. Takahashi, and K. Midorikawa, “Generation of a coherent x ray in the water window region at 1 kHz repetition rate using a mid-infrared pump source,” Opt. Lett. 34(11), 1747–1749 (2009).
[Crossref]

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

2008 (1)

E. J. Takahashi, T. Kanai, K. L. Ishikawa, Y. Nabekawa, and K. Midorikawa, “Coherent water window X ray by phase-matched high-order harmonic generation in neutral media,” Phys. Rev. Lett. 101(25), 253901 (2008).
[Crossref]

2007 (3)

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

P. Lan, P. Lu, W. Cao, and X. Wang, “Efficient generation of an isolated single-cycle attosecond pulse,” Phys. Rev. A 76(4), 043808 (2007).
[Crossref]

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

2006 (2)

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

S. Marchetti and R. Simili, “Accurate measurement of the refractive index of CO2, N2, He, O2, and air at 10.57 µ and T = 23° C,” Infrared Phys. Technol. 47(3), 263–266 (2006).
[Crossref]

2005 (1)

M. B. Gaarde, K. J. Schafer, A. Heinrich, J. Biegert, and U. Keller, “Large enhancement of macroscopic yield in attosecond pulse train–assisted harmonic generation,” Phys. Rev. A 72(1), 013411 (2005).
[Crossref]

2004 (1)

K. J. Schafer, M. B. Gaarde, A. Heinrich, J. Biegert, and U. Keller, “Strong field quantum path control using attosecond pulse trains,” Phys. Rev. Lett. 92(2), 023003 (2004).
[Crossref]

2001 (1)

B. Shan and Z. Chang, “Dramatic extension of the high-order harmonic cutoff by using a long-wavelength driving field,” Phys. Rev. A 65(1), 011804 (2001).
[Crossref]

1998 (1)

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

1994 (1)

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L’huillier, and P. B. Corkum, “Theory of high-harmonic generation by low-frequency laser fields,” Phys. Rev. A 49(3), 2117–2132 (1994).
[Crossref]

1993 (2)

P. B. Corkum, “Plasma perspective on strong field multiphoton ionization,” Phys. Rev. Lett. 71(13), 1994–1997 (1993).
[Crossref]

K. Schafer, B. Yang, L. DiMauro, and K. Kulander, “Above threshold ionization beyond the high harmonic cutoff,” Phys. Rev. Lett. 70(11), 1599–1602 (1993).
[Crossref]

1991 (1)

Agostini, P.

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

Ališauskas, S.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Andriukaitis, G.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Anscombe, M.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

Arnold, C.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Arpin, P.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Auguste, T.

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

Backus, S.

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Bahabad, A.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Balciunas, T.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Balcou, P.

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L’huillier, and P. B. Corkum, “Theory of high-harmonic generation by low-frequency laser fields,” Phys. Rev. A 49(3), 2117–2132 (1994).
[Crossref]

Balogh, E.

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

Bandulet, H.-C.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Biegert, J.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

M. B. Gaarde, K. J. Schafer, A. Heinrich, J. Biegert, and U. Keller, “Large enhancement of macroscopic yield in attosecond pulse train–assisted harmonic generation,” Phys. Rev. A 72(1), 013411 (2005).
[Crossref]

K. J. Schafer, M. B. Gaarde, A. Heinrich, J. Biegert, and U. Keller, “Strong field quantum path control using attosecond pulse trains,” Phys. Rev. Lett. 92(2), 023003 (2004).
[Crossref]

Birch, K. P.

Brizuela, F.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Brown, S.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Cao, W.

P. Lan, P. Lu, W. Cao, and X. Wang, “Efficient generation of an isolated single-cycle attosecond pulse,” Phys. Rev. A 76(4), 043808 (2007).
[Crossref]

Chang, Z.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

Z. Chang, P. B. Corkum, and S. R. Leone, “Attosecond optics and technology: progress to date and future prospects [Invited],” J. Opt. Soc. Am. B 33(6), 1081–1097 (2016).
[Crossref]

M. Chini, K. Zhao, and Z. Chang, “The generation, characterization and applications of broadband isolated attosecond pulses,” Nat. Photonics 8(3), 178–186 (2014).
[Crossref]

B. Shan and Z. Chang, “Dramatic extension of the high-order harmonic cutoff by using a long-wavelength driving field,” Phys. Rev. A 65(1), 011804 (2001).
[Crossref]

Z. Chang, Fundamentals of Attosecond Optics (CRC Press, 2011).

Chang, Z. H.

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Chen, M.-C.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Chen, Y.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Cheng, Y.

Chew, A.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

Chini, M.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

M. Chini, K. Zhao, and Z. Chang, “The generation, characterization and applications of broadband isolated attosecond pulses,” Nat. Photonics 8(3), 178–186 (2014).
[Crossref]

Chipperfield, L.

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

Christov, I. P.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Chu, W.

Cohen, O.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Comtois, D.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Corkum, P.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Corkum, P. B.

Z. Chang, P. B. Corkum, and S. R. Leone, “Attosecond optics and technology: progress to date and future prospects [Invited],” J. Opt. Soc. Am. B 33(6), 1081–1097 (2016).
[Crossref]

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L’huillier, and P. B. Corkum, “Theory of high-harmonic generation by low-frequency laser fields,” Phys. Rev. A 49(3), 2117–2132 (1994).
[Crossref]

P. B. Corkum, “Plasma perspective on strong field multiphoton ionization,” Phys. Rev. Lett. 71(13), 1994–1997 (1993).
[Crossref]

Corso, P.

G. Orlando, P. Corso, E. Fiordilino, and F. Persico, “A three-colour scheme to generate isolated attosecond pulses,” J. Phys. B: At., Mol. Opt. Phys. 43(2), 025602 (2010).
[Crossref]

Cunningham, E.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Dahlström, J.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

DiMauro, L.

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

K. Schafer, B. Yang, L. DiMauro, and K. Kulander, “Above threshold ionization beyond the high harmonic cutoff,” Phys. Rev. Lett. 70(11), 1599–1602 (1993).
[Crossref]

Dombi, P.

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

Du, H.

Durfee, C. G.

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Farkas, G.

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

Feng, L.

L. Feng and Y. Li, “High-intensity isolated attosecond X-ray pulse generation by using low-intensity ultraviolet–mid-infrared laser beam,” Eur. Phys. J. D 72(9), 167 (2018).
[Crossref]

Fiordilino, E.

G. Orlando, P. Corso, E. Fiordilino, and F. Persico, “A three-colour scheme to generate isolated attosecond pulses,” J. Phys. B: At., Mol. Opt. Phys. 43(2), 025602 (2010).
[Crossref]

Fu, Y.

Fulop, J. A.

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

Gaarde, M. B.

M. B. Gaarde, K. J. Schafer, A. Heinrich, J. Biegert, and U. Keller, “Large enhancement of macroscopic yield in attosecond pulse train–assisted harmonic generation,” Phys. Rev. A 72(1), 013411 (2005).
[Crossref]

K. J. Schafer, M. B. Gaarde, A. Heinrich, J. Biegert, and U. Keller, “Strong field quantum path control using attosecond pulse trains,” Phys. Rev. Lett. 92(2), 023003 (2004).
[Crossref]

Gerrity, M.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Giguère, M.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Hauri, C.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

Haworth, C.

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

Hebling, J.

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

Heinrich, A.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

M. B. Gaarde, K. J. Schafer, A. Heinrich, J. Biegert, and U. Keller, “Large enhancement of macroscopic yield in attosecond pulse train–assisted harmonic generation,” Phys. Rev. A 72(1), 013411 (2005).
[Crossref]

K. J. Schafer, M. B. Gaarde, A. Heinrich, J. Biegert, and U. Keller, “Strong field quantum path control using attosecond pulse trains,” Phys. Rev. Lett. 92(2), 023003 (2004).
[Crossref]

Herne, C.

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Heyl, C.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Hoegner, M.

M. Hoegner, https://github.com/Leberwurscht/HHGmax . https://www.attoworld.de/fileadmin/user_upload/tx_attoworld/publications/thesis_master_en_Y2013_LMU_FakPhys_HoegnerMaximilian.pdf .

Hu, B.

Hu, S.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Ishikawa, K. L.

E. J. Takahashi, T. Kanai, K. L. Ishikawa, Y. Nabekawa, and K. Midorikawa, “Coherent water window X ray by phase-matched high-order harmonic generation in neutral media,” Phys. Rev. Lett. 101(25), 253901 (2008).
[Crossref]

Ivanov, M.

F. Krausz and M. Ivanov, “Attosecond physics,” Rev. Mod. Phys. 81(1), 163–234 (2009).
[Crossref]

Ivanov, M. Y.

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L’huillier, and P. B. Corkum, “Theory of high-harmonic generation by low-frequency laser fields,” Phys. Rev. A 49(3), 2117–2132 (1994).
[Crossref]

Johnsson, P.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Kajumba, N.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Kanai, T.

E. J. Takahashi, T. Kanai, K. L. Ishikawa, Y. Nabekawa, and K. Midorikawa, “Coherent water window X ray by phase-matched high-order harmonic generation in neutral media,” Phys. Rev. Lett. 101(25), 253901 (2008).
[Crossref]

Kapteyn, H. C.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Keller, U.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

M. B. Gaarde, K. J. Schafer, A. Heinrich, J. Biegert, and U. Keller, “Large enhancement of macroscopic yield in attosecond pulse train–assisted harmonic generation,” Phys. Rev. A 72(1), 013411 (2005).
[Crossref]

K. J. Schafer, M. B. Gaarde, A. Heinrich, J. Biegert, and U. Keller, “Strong field quantum path control using attosecond pulse trains,” Phys. Rev. Lett. 92(2), 023003 (2004).
[Crossref]

Kieffer, J.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Knight, P.

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

Kornelis, W.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

Kovacs, K.

E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
[Crossref]

Krausz, F.

F. Krausz and M. Ivanov, “Attosecond physics,” Rev. Mod. Phys. 81(1), 163–234 (2009).
[Crossref]

Kroon, D.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Kulander, K.

K. Schafer, B. Yang, L. DiMauro, and K. Kulander, “Above threshold ionization beyond the high harmonic cutoff,” Phys. Rev. Lett. 70(11), 1599–1602 (1993).
[Crossref]

L’Huillier, A.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L’huillier, and P. B. Corkum, “Theory of high-harmonic generation by low-frequency laser fields,” Phys. Rev. A 49(3), 2117–2132 (1994).
[Crossref]

Lan, P.

P. Lan, P. Lu, W. Cao, and X. Wang, “Efficient generation of an isolated single-cycle attosecond pulse,” Phys. Rev. A 76(4), 043808 (2007).
[Crossref]

Légaré, F.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Leone, S. R.

Lewenstein, M.

M. Lewenstein, P. Balcou, M. Y. Ivanov, A. L’huillier, and P. B. Corkum, “Theory of high-harmonic generation by low-frequency laser fields,” Phys. Rev. A 49(3), 2117–2132 (1994).
[Crossref]

Li, J.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

Li, Y.

L. Feng and Y. Li, “High-intensity isolated attosecond X-ray pulse generation by using low-intensity ultraviolet–mid-infrared laser beam,” Eur. Phys. J. D 72(9), 167 (2018).
[Crossref]

Lu, P.

P. Lan, P. Lu, W. Cao, and X. Wang, “Efficient generation of an isolated single-cycle attosecond pulse,” Phys. Rev. A 76(4), 043808 (2007).
[Crossref]

Luo, L.

Marangos, J.

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

Marchetti, S.

S. Marchetti and R. Simili, “Accurate measurement of the refractive index of CO2, N2, He, O2, and air at 10.57 µ and T = 23° C,” Infrared Phys. Technol. 47(3), 263–266 (2006).
[Crossref]

Mauritsson, J.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Midorikawa, K.

H. Xiong, H. Xu, Y. Fu, J. Yao, B. Zeng, W. Chu, Y. Cheng, Z. Xu, E. J. Takahashi, and K. Midorikawa, “Generation of a coherent x ray in the water window region at 1 kHz repetition rate using a mid-infrared pump source,” Opt. Lett. 34(11), 1747–1749 (2009).
[Crossref]

E. J. Takahashi, T. Kanai, K. L. Ishikawa, Y. Nabekawa, and K. Midorikawa, “Coherent water window X ray by phase-matched high-order harmonic generation in neutral media,” Phys. Rev. Lett. 101(25), 253901 (2008).
[Crossref]

Mücke, O. D.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Muller, H.

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

Murnane, M. M.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Nabekawa, Y.

E. J. Takahashi, T. Kanai, K. L. Ishikawa, Y. Nabekawa, and K. Midorikawa, “Coherent water window X ray by phase-matched high-order harmonic generation in neutral media,” Phys. Rev. Lett. 101(25), 253901 (2008).
[Crossref]

Orlando, G.

G. Orlando, P. Corso, E. Fiordilino, and F. Persico, “A three-colour scheme to generate isolated attosecond pulses,” J. Phys. B: At., Mol. Opt. Phys. 43(2), 025602 (2010).
[Crossref]

Persico, F.

G. Orlando, P. Corso, E. Fiordilino, and F. Persico, “A three-colour scheme to generate isolated attosecond pulses,” J. Phys. B: At., Mol. Opt. Phys. 43(2), 025602 (2010).
[Crossref]

Popmintchev, D.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Popmintchev, T.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Pugzlys, A.

T. Popmintchev, M.-C. Chen, D. Popmintchev, P. Arpin, S. Brown, S. Ališauskas, G. Andriukaitis, T. Balčiunas, O. D. Mücke, and A. Pugzlys, “Bright coherent ultrahigh harmonics in the keV x-ray regime from mid-infrared femtosecond lasers,” Science 336(6086), 1287–1291 (2012).
[Crossref]

Rading, L.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Ren, X.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
[Crossref]

Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

Robinson, J.

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

Rudawski, P.

F. Brizuela, C. Heyl, P. Rudawski, D. Kroon, L. Rading, J. Dahlström, J. Mauritsson, P. Johnsson, C. Arnold, and A. L’Huillier, “Efficient high-order harmonic generation boosted by below-threshold harmonics,” Sci. Rep. 3(1), 1410 (2013).
[Crossref]

Rundquist, A.

A. Rundquist, C. G. Durfee, Z. H. Chang, C. Herne, S. Backus, M. M. Murnane, and H. C. Kapteyn, “Phase-matched generation of coherent soft X-rays,” Science 280(5368), 1412–1415 (1998).
[Crossref]

Salieres, P.

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

Schafer, K.

K. Schafer, B. Yang, L. DiMauro, and K. Kulander, “Above threshold ionization beyond the high harmonic cutoff,” Phys. Rev. Lett. 70(11), 1599–1602 (1993).
[Crossref]

Schafer, K. J.

M. B. Gaarde, K. J. Schafer, A. Heinrich, J. Biegert, and U. Keller, “Large enhancement of macroscopic yield in attosecond pulse train–assisted harmonic generation,” Phys. Rev. A 72(1), 013411 (2005).
[Crossref]

K. J. Schafer, M. B. Gaarde, A. Heinrich, J. Biegert, and U. Keller, “Strong field quantum path control using attosecond pulse trains,” Phys. Rev. Lett. 92(2), 023003 (2004).
[Crossref]

Schlup, P.

A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
[Crossref]

Shan, B.

B. Shan and Z. Chang, “Dramatic extension of the high-order harmonic cutoff by using a long-wavelength driving field,” Phys. Rev. A 65(1), 011804 (2001).
[Crossref]

Shiner, A.

A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
[Crossref]

Sidorenko, P.

T. Popmintchev, M.-C. Chen, A. Bahabad, M. Gerrity, P. Sidorenko, O. Cohen, I. P. Christov, M. M. Murnane, and H. C. Kapteyn, “Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum,” Proc. Natl. Acad. Sci. 106(26), 10516–10521 (2009).
[Crossref]

Simili, R.

S. Marchetti and R. Simili, “Accurate measurement of the refractive index of CO2, N2, He, O2, and air at 10.57 µ and T = 23° C,” Infrared Phys. Technol. 47(3), 263–266 (2006).
[Crossref]

Takahashi, E. J.

H. Xiong, H. Xu, Y. Fu, J. Yao, B. Zeng, W. Chu, Y. Cheng, Z. Xu, E. J. Takahashi, and K. Midorikawa, “Generation of a coherent x ray in the water window region at 1 kHz repetition rate using a mid-infrared pump source,” Opt. Lett. 34(11), 1747–1749 (2009).
[Crossref]

E. J. Takahashi, T. Kanai, K. L. Ishikawa, Y. Nabekawa, and K. Midorikawa, “Coherent water window X ray by phase-matched high-order harmonic generation in neutral media,” Phys. Rev. Lett. 101(25), 253901 (2008).
[Crossref]

Tate, J.

J. Tate, T. Auguste, H. Muller, P. Salieres, P. Agostini, and L. DiMauro, “Scaling of wave-packet dynamics in an intense midinfrared field,” Phys. Rev. Lett. 98(1), 013901 (2007).
[Crossref]

Tisch, J.

C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
[Crossref]

Tosa, V.

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E. Balogh, K. Kovacs, P. Dombi, J. A. Fulop, G. Farkas, J. Hebling, V. Tosa, and K. Varju, “Single attosecond pulse from terahertz-assisted high-order harmonic generation,” Phys. Rev. A 84(2), 023806 (2011).
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A. Shiner, C. Trallero-Herrero, N. Kajumba, H.-C. Bandulet, D. Comtois, F. Légaré, M. Giguère, J. Kieffer, P. Corkum, and D. Villeneuve, “Wavelength scaling of high harmonic generation efficiency,” Phys. Rev. Lett. 103(7), 073902 (2009).
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X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
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Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
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Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

Zeng, B.

Zhao, K.

X. Ren, J. Li, Y. Yin, K. Zhao, A. Chew, Y. Wang, S. Hu, Y. Chen, E. Cunningham, Y. Wu, M. Chini, and Z. Chang, “Attosecond light sources in the water window,” J. Opt. 20(2), 023001 (2018).
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M. Chini, K. Zhao, and Z. Chang, “The generation, characterization and applications of broadband isolated attosecond pulses,” Nat. Photonics 8(3), 178–186 (2014).
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L. Feng and Y. Li, “High-intensity isolated attosecond X-ray pulse generation by using low-intensity ultraviolet–mid-infrared laser beam,” Eur. Phys. J. D 72(9), 167 (2018).
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S. Marchetti and R. Simili, “Accurate measurement of the refractive index of CO2, N2, He, O2, and air at 10.57 µ and T = 23° C,” Infrared Phys. Technol. 47(3), 263–266 (2006).
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A. Heinrich, W. Kornelis, M. Anscombe, C. Hauri, P. Schlup, J. Biegert, and U. Keller, “Enhanced VUV-assisted high harmonic generation,” J. Phys. B: At., Mol. Opt. Phys. 39(13), S275–S281 (2006).
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M. Chini, K. Zhao, and Z. Chang, “The generation, characterization and applications of broadband isolated attosecond pulses,” Nat. Photonics 8(3), 178–186 (2014).
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C. Haworth, L. Chipperfield, J. Robinson, P. Knight, J. Marangos, and J. Tisch, “Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval,” Nat. Phys. 3(1), 52–57 (2007).
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P. B. Corkum, “Plasma perspective on strong field multiphoton ionization,” Phys. Rev. Lett. 71(13), 1994–1997 (1993).
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Proc. Natl. Acad. Sci. (1)

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Y. Yin, A. Chew, X. Ren, J. Li, Y. Wang, Y. Wu, and Z. Chang, “Towards terawatt sub-cycle long-wave infrared pulses via chirped optical parametric amplification and indirect pulse shaping,” Sci. Rep. 7(1), 45794 (2017).
[Crossref]

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Other (2)

M. Hoegner, https://github.com/Leberwurscht/HHGmax . https://www.attoworld.de/fileadmin/user_upload/tx_attoworld/publications/thesis_master_en_Y2013_LMU_FakPhys_HoegnerMaximilian.pdf .

Z. Chang, Fundamentals of Attosecond Optics (CRC Press, 2011).

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Figures (3)

Fig. 1.
Fig. 1. (a) A 34 fs LWIR driving laser field centered at 8 µm (blue line) and the ionization probability of a helium atom (red line). The peak intensity is $2.86 \times {10^{14}}$ W/cm2. The carrier envelope phase is 0 rad. (b) A 3.4 fs NIR pulse centered at 800 nm is added to a LWIR pulse whose intensity is $2.18 \times {10^{14}}$W/cm2. The intensity of the NIR pulse is 1/3 that of the LWIR pulse. The CEP of the NIR pulse is -0.982 rad. The peak of the NIR pulse envelope is 10.67 fs ahead of the LWIR pulse. The green arrows indicate the times of electron release and re-collision for generating a single X-ray pulse.
Fig. 2.
Fig. 2. (a) Power spectra of the high harmonics generated with a LWIR pulse alone (yellow line) and with a LWIR pulse combined with a NIR pulse. The laser parameters are explained in Fig. 1. (b) X-ray pulses corresponding to the spectra in the plateau adjacent to the cutoff.
Fig. 3.
Fig. 3. High harmonic spectra generated with the combined 8 micron and 800 nm pulses. (a) The CEP of the 800 nm pulse is changed. (b) The intensity ratio between the 800 nm and 8 micron pulses is varied.

Equations (2)

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n a ( ω L ) = 1 + e 2 2 ε 0 m e N a ω r 2 ω L 2 ,
p p m ( ω L ) = ( ω L ω r ) 2 .

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