Acousto-optical device based on phonon-induced polaritonic band gaps
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United States of America Patent
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Apr 24, 2007
Grant Date -
Dec 9, 2004
app pub date -
Sep 4, 2002
filing date -
Sep 4, 2001
priority date (Note) -
Expired
status (Latency Note)
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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.
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