1982-12-20
1984-02-21
Arnold, Bruce Y.
G05D 2502
Patent
active
044326149
ABSTRACT:
An electrooptic device for controlling the intensity of a monochromatic light beam comprises a transparent element having opposed planar surfaces operable to reflect a collimated light beam alternately from the two surfaces. A plurality of semiconductor structures contact one surface of the device at regions where the collimated light beam reflects from that surface. Each semiconductor structure includes a thin layer of a material such as a metal in contact with the planar surface of the transparent element and a semiconductor material adjacent to the metal layer. A voltage source provides a potential between the metal layer and the semiconductor material of each structure to separately alter the charge density in the semiconductor material of each structure to affect the degree of coupling between the light beam entering the device and surface plasmon waves generated within each structure. The device is operable as a signal mixer or an optical logic switching device.
REFERENCES:
patent: 3153691 (1964-10-01), Kibler
patent: 4128299 (1978-12-01), Maher
Gordon, J. G. II et al, "Electrochromic Attenuated Total Reflection Modulator", IBM Tech. Disclosure Bull, vol. 22 No. 5, Oct. 1979 p. 2074.
Chen Yung J.
McNeill William H.
Arnold Bruce Y.
Fisher Fred
GTE Laboratories Incorporated
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