Light Modulation by Polariton Directional-Coupler-Type Devices

Kazuhiko HOSOMI
Masataka SHIRAI
Junji SHIGETA
Tomoyoshi MISHIMA
Toshio KATSUYAMA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E82-C    No.8    pp.1509-1513
Publication Date: 1999/08/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Active Devices and Modules
Keyword: 
polariton,  light modulation,  directional-coupler-type device,  

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Summary: 
A GaAs/AlGaAs directional-coupler-type device that use polariton propagation was fabricated and its switching operation was demonstrated. The length of the switching region is as small as 300 µm. The output signal modulation under an electric field shows typical characteristics of directional-coupler type switching. The measured operation voltage is 2 V for an operation wavelength of 805 nm at 10 K. The corresponding signal extinction ratio is 8 dB. These experimental results confirm the efficient operation of the polariton devices, which can be applied to especially small optical -switching devices with low-voltage operation.