Optical bistable devices based on bound exciton nonlinearity

Details Optical bistable devices based on bound exciton nonlinearity Optical bistable devices based on bound exciton nonlinearity

1985-11-12

1991-06-11

LaRoche, Eugene R.

Coherent light generators

Particular component circuitry

Optical pumping

350354, 372 8, 372 21, G02F 101, G02B 523

Patent

active

050227416

ABSTRACT:
The I.sub.2 bound exciton in cadmium sulfide (bound to a neutral donor) is a very efficient radiator, providing low switching energy and fast switching times for an ON and OFF optical bistable device, desirable for all-optical signal processing applications. The optical bistable device for light at a given wavelength includes a Fabry-Perot cavity having a pair of opposed mirrored surfaces. A direct bandgap semiconductor, such as CuCl, CdSe, CdS, and GaAs having a bound exciton, is located within the cavity. The cavity is tuned near resonance of the light. The bound exciton has a coefficient of absorption tuned near resonance. A light beam of varying intensity is applied from without the cavity to one of the surfaces. The semiconductor has both an index of refraction and a coefficient of absorption that vary with the magnitude of applied light. Thus, light applied thereto passes through the device either substantially unimpeded or impeded, dependent upon its magnitude.

REFERENCES:
patent: 3610731 (1971-10-01), Seidel
patent: 4468772 (1984-08-01), Oudar
patent: 4630898 (1986-12-01), Jewell
Smith et al., "Bistable Optical Devices Promise Subpicosecond Switching", IEEE Spectrum, Jun. 1981, pp. 26-33.
Anon, "All-Optical GaAs Chip: Bistable at Room Temperature", Electro-Optical Systems Design, May 1982, p. 12.
Peyghambarian et al., "Optical Nonlinearity and Bistability Due to the Bioexciton Two-Photon Resonance in CuCl", Optical Bistability 2, 1984 (from Optical Bistablity, Jun. 15-17, 1983), pp. 259-266.
Pagenais et al., "Carityless Optical Bistability Due to Light-Induced Absorption in Cadmium Sulfide", Appl. Phys. Lott. 45(3), Aug. 1, 1984, pp. 210-212.
Bohnert et al, "Plasma Induced Optical Nonlinearities and Optical Bistabilition CdS", Z. Phys. B-Condensed Matter 57, No. 4, pp. 263-272, Dec. 1984.
Gibbs et al., "Room Temperature Excitonic Optical Bistability in GaAs-GaAlAs Superlattice Etalon", Appl. Phys. Lett., vol. 41(3), Aug. 1, 1982.

Affiliated with

Also associated with

Rating

Optical bistable devices based on bound exciton nonlinearity does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical bistable devices based on bound exciton nonlinearity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical bistable devices based on bound exciton nonlinearity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-778966