TY - JOUR
T1 - Nonlinear transmission of MBE-grown ZnSe epilayers in the near-band-edge region
AU - Presser, N.
AU - Kudlek, G.
AU - Gutowski, J.
AU - Menke, D. R.
AU - Kobayashi, M.
AU - Gunshor, R. L.
N1 - Funding Information:
Acknouledqeaent-We acknowledge support by Deutsche ForschungsqeWeinschaft (Berlin group), by the Defense Advanced Research Projects Mninistration and by the US Air Force office of Scientific Research (Purdue group).
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - The nonlinear optical transmission of ZnSe epilayers grown by molecular beam epitaxy (MBE) is studied in the near-band-edge region. In single-beam transmission as well as in pump-and-probe experiments at 1.8 K, induced absorption is observed in the excitonic regime for increasing (pump) laser intensity. The diminishing of the excitonic absorption features, the failure to observe specific pump-laser resonances of the induced absorption in pump-and-probe experiments, and the fact that the 'efficiency edge' of the pump process is shifted to lower energies for increasing excitation intensity show that electron-hole plasma is created in the thin layer which prevents longitudinal carrier diffusion. However, at 77 K, induced transmission is observed in the excitonic regime indicating exciton bleaching, most probably caused by exciton screening and collision broadening for excitation densities not yielding excess of the Mott density of the created carriers.
AB - The nonlinear optical transmission of ZnSe epilayers grown by molecular beam epitaxy (MBE) is studied in the near-band-edge region. In single-beam transmission as well as in pump-and-probe experiments at 1.8 K, induced absorption is observed in the excitonic regime for increasing (pump) laser intensity. The diminishing of the excitonic absorption features, the failure to observe specific pump-laser resonances of the induced absorption in pump-and-probe experiments, and the fact that the 'efficiency edge' of the pump process is shifted to lower energies for increasing excitation intensity show that electron-hole plasma is created in the thin layer which prevents longitudinal carrier diffusion. However, at 77 K, induced transmission is observed in the excitonic regime indicating exciton bleaching, most probably caused by exciton screening and collision broadening for excitation densities not yielding excess of the Mott density of the created carriers.
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U2 - 10.1016/0749-6036(91)90240-R
DO - 10.1016/0749-6036(91)90240-R
M3 - Article
AN - SCOPUS:0025747244
SN - 0749-6036
VL - 10
SP - 247
EP - 252
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
IS - 2
ER -