Acousto-optical device based on phonon-induced polaritonic...

Details Acousto-optical device based on phonon-induced polaritonic... Acousto-optical device based on phonon-induced polaritonic...

2007-04-24

2007-04-24

Healy, Brian M. (Department: 2883)

Optical waveguides

Directional optical modulation within an optical waveguide

Acousto-optic

C385S001000, C385S002000, C385S008000, C385S010000, C385S011000, C385S031000, C359S333000, C359S341100, C359S341310, C359S346000

Reexamination Certificate

active

10488440

ABSTRACT:
The device comprises an optical waveguide and an acoustic wave generating device. The waveguide has an optical band gap and a sharp electronic transition (e.g. an excitonic transition) in the band gap, and the acoustic wave generating device generates acoustic waves within the waveguide. Light passing through the waveguide is of a frequency within the band gap of the waveguide and is nearly resonant with the sharp electronic transition. The wave generating device is arranged to generate acoustic waves so as to induce optical band gas in the polariton spectrum, thereby affecting the transmission of the light passing through the waveguide, the transmission of which is thereby affected.

REFERENCES:
patent: 6751368 (2004-06-01), Lim et al.
patent: 6925226 (2005-08-01), Lim et al.
patent: 2002/0094150 (2002-07-01), Lim et al.
patent: 2004/0247224 (2004-12-01), Littlewood et al.
Irby, J. H. et al.: “Calculation of Deltan2 and Kappa for an Acoustically Induced Distribution Bragg Reflector (ADBR)”, IEEE Journal of Quantum Electronics, IEEE Inc., New York, US, vol. 34, No. 2, Feb. 1, 1998, pp. 213-224, XP000737230.
Ivanov, A. L. et al.: “Acoustically Induced Stark Effect for Excitons in Intrinsic Semiconductors”, Physical Review Letters, Sep. 24, 2001, APS, USA, vol. 87, No. 13, pp. 136403/1-4, XP002223216.

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