Array of bistable devices and apparatus and methods for creating

Details Array of bistable devices and apparatus and methods for creating Array of bistable devices and apparatus and methods for creating

1985-12-20

1990-05-01

Bovernick, Rodney B.

350386, G02F 1015

Patent

active

049213369

ABSTRACT:
An array of bistable devices includes a thin cadmium sulfide platelet having a first portion thereof that is substantially pure and the remaining portion thereof is implanted with atoms that can bind excitons. Such remaining portion can be implanted with ions from a lithium source. Apparatus for providing such an array can include a source of lithium ions and masking means for selectively permitting and for selectively inhibiting passage of ions from the source to pass therethrough and to implant in a pattern onto the platelet. The apparatus operates at temperatures in the neighborhood of liquid helium. A method for producing such an array includes providing a thin, substantially pure, platelet of cadmium sulfide, selectively masking the platelet with a pattern to selectively permit and to selectively inhibit passage of ions onto the platelet, and providing a source of ions. The source of ions, in accordance with certain features, can be lithium ions.

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Athale et al., "Development of an Optical Parallel Logic Device and a Half-Adder Circuit for Digital Optical Processing", Optical Engineering, 9,10-79, pp. 513-517.
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Korsunskaya et al., "Drift of Interstitial Atoms in an Electric Field Applied to Pure and Li-Doped CDS Crystals", Sov. Phys. Semicond. 2-1981, pp. 161-163.
Dagenais et al., "Low Power Transverse Optical Bistability Near Bound Excitons in Cadmium Sulfide", App. Phy. Lett., 3-15-84, pp. 574-576.
Dagenais et al., "Linear-and Nonlinear-Optical Properties of Free & Bound Excitons in CDS & Applications in Bistable Devices", Jr. Opt. Soc. Am. B., 7-1985, pp. 1179-1187.

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