A rigorous numerical modeling of exciton electroabsorption in coupled multiple quantum wells modulators

Author

Darabi, E. ; Ahmadi, V.

Author_Institution

Dept. of Phys. & Nucl. Sci., Amirkabir Univ. of Technol., Tehran, Iran

fYear

2004

fDate

6-9 Sept. 2004

Firstpage

128

Lastpage

132

Abstract

In this paper an accurate model for calculation electroabsorption spectrum of CMQWS modulators is proposed. First, the electron and hole subband energy levels and their envelope wave functions are calculated using transfer matrix method (TMM). Next a variational method is used to obtain the exciton binding energy and its wave function. Then electroabsorption spectrum for TE and TM mode of input light is calculated considering band to band and excitonic transitions without any fitting parameter. The broadening of excitonic peak with phonon interaction, applied electric field, well width variation, temperature fluctuation and quasi bound life time is taken into account. Then, numerical results are presented. The results are in good agreement with experimental results reported.

Keywords

binding energy; electro-optical modulation; electroabsorption; phonon-exciton interactions; quantum well devices; semiconductor device models; transfer function matrices; variational techniques; CMQWS; coupled multiple quantum wells modulators; electron subband energy level; envelope wave functions; exciton binding energy; exciton electroabsorption; exciton-phonon interaction; hole subband energy level; quasibound life time; variational method; Charge carrier processes; Eigenvalues and eigenfunctions; Energy states; Equations; Excitons; Numerical models; Optical coupling; Physics; Potential well; Wave functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Laser and Fiber-Optical Networks Modeling, 2004. Proceedings of LFNM 2004. 6th International Conference on

Print_ISBN

0-7803-8429-6

Type

conf

DOI

10.1109/LFNM.2004.1382442

Filename

1382442