Abstract

Highly oriented pyrolytic graphite is ablated by femtosecond laser in air and vacuum, respectively. The morphologies and material components of the ablated target surface are examined by scanning electron microscopy and micro-Raman spectroscopy. For laser fluence no less than 0.5J/cm2, the laser-induced periodic surface grooves formed in air are found to be much less clearer than those formed in vacuum; beneath the amorphous carbon debris, the surface ablated in air is composed of nanocrystalline graphite, but in vacuum it retains the ordered graphite structure. The thermal relaxation of the ablated target induced by air-assisted heat transfer is considered to be the main reason for the differences. The transportation of air molecules along the surface, the classical size effect of heat conduction and high solid-air heat transfer coefficient in nanoscale enhance the air-assisted heat transfer.

© 2014 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
High spectral resolution x-ray optics with highly oriented pyrolytic graphite

H. Legall, H. Stiel, V. Arkadiev, and A.A. Bjeoumikhov
Opt. Express 14(10) 4570-4576 (2006)

Effects of the amorphous layer on laser-induced subwavelength structures on carbon allotropes

Min Huang, Fuli Zhao, Ya Cheng, and Zhizhan Xu
Opt. Lett. 37(4) 677-679 (2012)

High efficiency, high quality x-ray optic based on ellipsoidally bent highly oriented pyrolytic graphite crystal for ultrafast x-ray diffraction experiments

I. Uschmann, U. Nothelle, E. Förster, V. Arkadiev, N. Langhoff, A. Antonov, I. Grigorieva, R. Steinkopf, and A. Gebhardt
Appl. Opt. 44(24) 5069-5075 (2005)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription