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Published September 1995 | Published
Journal Article Open

Millimeter-Wave Diffraction by a Photo-Induced Plasma Grating


Optical gratings are used extensively for beamsteering in the visible and IR range of the spectrum. Change in the dielectric permittivity of a semiconductor medium resulting from the excitation of a nonequilibrium electron-hole plasma makes it possible to extend this technique to MMW frequencies. A photo-induced plasma grating (PIPG) can be easily rewritten by changing the illumination pattern. So this technique can be used in optically controllable MMW antennas. Initial experimental work studied the diffraction of MMW propagating along a dielectric waveguide containing a PIPG. This paper reports on the diffraction of MMW propagating in free space, steered by the PIPG.

Additional Information

© 1995 IEEE. Manuscript received January 13, 1995; revised March 20, 1995. Date of Current Version: 06 August 2002. This work was supported in part by a contract from ONR (Project Monitor, W. Miceli).

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Published - MANieeetmtt95.pdf


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