Photonic band edge optical diode
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United States of America Patent
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Sep 24, 1996
Grant Date -
N/A
app pub date -
Apr 25, 1995
filing date -
Apr 25, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A new optical diode is disclosed that permits unidirectional transmission of light, the direction of transmission depending on the direction of incidence. The diode comprises a stack of alternating layers of a low-index material and a high-index material. The layers are arranged within the stack such that there is spatial anisotropy of optical pathlengths in the stack and at least the low-index layers or the high-index layers have an optical nonlinearity, either inherently or by doping. At sufficiently high incident intensifies and appropriate wavelengths, such a diode exhibits partial transmission of input light incident from one direction while reflecting almost totally input light incident from the opposite direction.
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