Title :
Does quantum well with mass-dependent width work well in long wavelength?
Author :
Kato, Masaki ; Tada, Kunio ; Nakano, Yoshiaki
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
Abstract :
We discuss lattice-matched and tensile-strained InGaAs/InAlAs quantum wells with mass-dependent width (MDW QWs) operating at long wavelength through numerical analysis which takes into account the effect of valence band mixing on the basis of k·p perturbation theory. This analysis reveals that, in lattice-matched MDW QW, the Stark shift of light hole 1 exciton is suppressed due to strong band mixing between heavy hole 2 and light hole 1 and that, in tensile-strained MDW QW, the exciton oscillator strength of heavy hole 1 decreases drastically above an electric field of 100 kV/cm. Therefore, the effectiveness of the MDW QW is limited in the long wavelength range
Keywords :
III-V semiconductors; Stark effect; absorption coefficients; aluminium compounds; electro-optical modulation; excitons; gallium arsenide; indium compounds; k.p calculations; perturbation theory; semiconductor quantum wells; valence bands; InGaAs-InAlAs; Stark shift; absorption coefficients; exciton oscillator strength; k·p perturbation theory; lattice-matched quantum wells; mass-dependent width; optical modulation; tensile-strained quantum wells; valence band mixing; Excitons; Indium compounds; Indium gallium arsenide; Indium phosphide; Numerical analysis; Optical materials; Optical polarization; Optical switches; Oscillators; Quantum mechanics;
Conference_Titel :
Indium Phosphide and Related Materials, 1998 International Conference on
Conference_Location :
Tsukuba
Print_ISBN :
0-7803-4220-8
DOI :
10.1109/ICIPRM.1998.712731
