Optical Control of Millimeter Waves in the Semiconductor Waveguide (Special Issue on Optical/Microwave Interaction Devices, Circuits and Systems)

概要

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The various propagation characteristics of millimeter waves in silicon rib and image guides containing the optically induced plasma region have been investigated. Phase shift and attenuation properties resulting from the presence of plasma are evaluated using the effective dielectric constant method. Experiments have been carried out to demonstrate the optical control of millimeter waves at frequencies ranging from 〜50 GHz using high-resistivity silicon illuminated by a high-power Xenon arc lamp and light emitting diodes. Optical control of millimeter wave attenuation of 20 dB has been confirmed for a guide of length 90 mm and plasma density of ^<21>m^3 with average plasma thickness of 20 μm. To increase the sensitivity of optical control, Bragg reflection filte characteristics are studied and its stop band characteristics have been calculated using the transmission line model, and confirmed experimentally. To further develop the Bragg reflection filter, a Mach-Zehnder interferometer guide with one of the arms periodically corrugated is newly proposed and its optical control performance is confirmed by experiments. Finally the field distributions of the Mach-Zehnder configuration of rib waveguides are measured by a simple optical probing technique using the focused laser spot.
社団法人電子情報通信学会の論文
1993-02-25