Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
72 (1998), S. 821-823
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have investigated the optical properties of metalorganic vapor phase epitaxy grown (Al0.5Ga0.5)0.52In0.48P samples with different degrees of CuPtB-type ordering. With increasing excitation intensity, the photoluminescence (PL) exhibits a blueshift (moving emission) which is typical for ordered material. At high excitation intensities, this blueshift is shown to result from filling of localized tail states. Further evidence for the existence of an exponential tail of localized states is provided by the form of the PL line shape for high, quasistationary excitation and by the carrier hopping relaxation demonstrated by time-resolved PL. Applying the variable stripe-length method, we have determined the spectra of the optical gain. Stimulated emission is shown to occur from localized states. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.120904
Permalink
|
Location |
Call Number |
Expected |
Availability |