DocumentCode :
815776
Title :
Orientation dependence of optical properties in long wavelength strained quantum-well lasers
Author :
Niwa, Atsuko ; Ohtoshi, Tsukuru ; Kuroda, Takao
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
Volume :
1
Issue :
2
fYear :
1995
fDate :
6/1/1995 12:00:00 AM
Firstpage :
211
Lastpage :
217
Abstract :
The dependence of optical properties on crystal orientation is analyzed for long wavelength strained quantum-well (QW) GaAsP-InGaAsP lasers. The calculation is based on the multiband effective mass theory which enables us to consider the anisotropy and the nonparabolicity of the valence-band dispersions. It is found that the optical gain increases as the crystal orientation is inclined from (001) toward (110). This is due to the reduced valence-band density of states. The differential gain is about 1.6 times larger for the (110)-oriented 1.55-μm strained QW´s than for equivalent (001)-oriented QW´s. It is also shown that the threshold current density in 1.3-μm strained QW lasers decreases to two-thirds of that in the (001)-oriented laser as the orientation is inclined away from (001) by 40°-90
Keywords :
III-V semiconductors; crystal orientation; current density; effective mass; gallium arsenide; gallium compounds; indium compounds; laser theory; quantum well lasers; valence bands; (110)-oriented; 1.3 mum; 1.55 mum; GaAsP-InGaAsP; GaAsP-InGaAsP lasers; anisotropy; crystal orientation; differential gain; long wavelength; long wavelength strained quantum-well lasers; multiband effective mass theory; nonparabolicity; optical gain; optical properties; orientation dependence; reduced valence-band density of states; strained quantum-well; threshold current density; valence-band dispersions; Anisotropic magnetoresistance; Bandwidth; Capacitive sensors; Dispersion; Effective mass; Geometrical optics; Laser theory; Optical mixing; Quantum well lasers; Threshold current;
fLanguage :
English
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
1077-260X
Type :
jour
DOI :
10.1109/2944.401199
Filename :
401199
Link To Document :
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