Title :
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
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 InxGa1-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;
Conference_Titel :
Indium Phosphide and Related Materials, 1998 International Conference on
Conference_Location :
Tsukuba
Print_ISBN :
0-7803-4220-8
DOI :
10.1109/ICIPRM.1998.712447
