Optoelectronic Modulation of Millimeter Waves in a Silicon-on-Sapphire Waveguide
Recently a great deal of attention has been given to a general class of switching and gating devices based on the photoconductivity effect using picosecond optical pulses. The photoconductivity effect is a long wavelength limit of a more general phenomenon, in which the complex dielectric constant of a semiconductor is modified by the introduction of an optically induced electron-hole plasma. A millimeter-wave propagating in a semiconductor waveguide experiences both attenuation and phase-shift when an electron-hole plasma is optically induced in the waveguide.
KeywordsPulse Train Optical Pulse Dielectric Waveguide Bulk Silicon Complex Dielectric Constant
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