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

fYear

1998

fDate

11-15 May 1998

Firstpage

683

Lastpage

686

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Indium Phosphide and Related Materials, 1998 International Conference on

Conference_Location

Tsukuba

ISSN

1092-8669

Print_ISBN

0-7803-4220-8

Type

conf

DOI

10.1109/ICIPRM.1998.712731

Filename

712731