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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1992),
  • paper CWK1

Dynamics of the exciton lattice interaction and exciton radiative decay in a GaAs quantum well

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Abstract

We report time resolved (TR) photolum-inescence (PL) experiments on a high-quality single GaAs quantum well (QW) using a synchronously pumped mode-locked Styryl 8 laser and a 2-D synchroscan streak camera. The experimental setup provides a temporal and spectral resolution of 15-25 ps and 0.5 meV, respectively. The 27-nm GaAs/AI0.3Ga0.7As QW featured by the insertion of three monolayers of AlAs at the interfaces for interface smoothing is distinguished by a single heavy-hole (hh) exciton PL line width of only 0.2 meV (measured for an excitation spot diam 70 μm) and no detectable Stokes shift between the absorption and the PL peak of the hh-exciton transition.1

© 1992 Optical Society of America

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