Large Third Order Nonlinear Optical Response of Exciton by Controlling the Thickness of GaAs Thin Films

Koichi AKIYAMA  Nobuyuki TOMITA  Yoshinori NOMURA  Toshiro ISU  Hajime ISHIHARA  Kikuo CHO  

IEICE TRANSACTIONS on Electronics   Vol.E83-C   No.6   pp.936-937
Publication Date: 2000/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Advanced Optical Devices for Next Generation High-Speed Communication Systems and Photonic Networks)
Category: Switches and Novel Devices
nonlinear optical response,  GaAs thin film,  exciton,  four-wave mixing,  

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We demonstrate a large nonlinear optical response of GaAs thin films using degenerate four-wave mixing (DFWM) with picosecond pulses. The obtained DFWM signal is thickness-dependent and peaks at around 110 nm. The nonlocal theory fully explains these results.