Polarization-independent large field-induced refractive index change in a strained five-step GaAs–InAlGaAs asymmetric coupled quantum well
作者:
H. Feng,
K. Tada,
Y. Nakano,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 18
页码: 2674-2676
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120175
出版商: AIP
数据来源: AIP
摘要:
A tensile-strained five-step asymmetric coupled quantum well (FACQW) structure is proposed for large field-induced refractive index change without polarization dependence and redshift of the absorption edge. A strong exciton absorption peak is caused by electron-hole transitions between symmetric wave functions and antisymmetric wave functions with a small applied electric field. The field-induced refractive index change of strained the FACQW is larger by one order of magnitude compared to that of a rectangular quantum well and the difference in the refractive index change of TE and TM modes is under 2&percent; when the operation wavelength is not at the absorption edge. ©1997 American Institute of Physics.
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