Ultrafast high-efficiency all-optical modulators using intersubband transition in asymmetric quantum wells

Author

Neogi, A. ; Yoshida, H. ; Mozume, T. ; Wada, O.

Author_Institution

FESTA Lab., Femtosecond. Technol. Res. Assoc., Tsukuba, Japan

fYear

1998

fDate

11-15 May 1998

Firstpage

243

Lastpage

246

Abstract

An efficient modulation scheme at relatively lower control light intensities is proposed using ultrashort interband and intersubband-resonant coupling light pulses in a novel asymmetric In_xGa_1-xAs/AlAs semiconductor quantum well system. The IB-light pulse absorption can be manipulated by the shape of the ISB-lightpulses. The threshold optical energy required for an efficient modulation can be reduced below 100 pJ by using 500 fs control light pulses in the proposed structure

Keywords

III-V semiconductors; aluminium compounds; gallium arsenide; high-speed optical techniques; indium compounds; nonlinear optics; optical modulation; optical switches; semiconductor quantum wells; 100 pJ; 500 fs; InGaAs-AlAs; all-optical modulators; asymmetric quantum wells; interband-resonant coupling light pulses; intersubband transition; intersubband-resonant coupling light pulses; threshold optical energy; ultrafast high-efficiency modulators; Absorption; Control systems; Intensity modulation; Lighting control; Optical coupling; Optical modulation; Optical pulse shaping; Optical pulses; Pulse modulation; Shape;

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.1998.712447

Filename

712447