Thin film polarizing device having metal-dielectric films
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United States of America Patent
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Nov 13, 2001
Grant Date -
N/A
app pub date -
Dec 17, 1999
filing date -
Dec 18, 1998
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Abstract
A thin film polarizing device has a functional core consisting of at least two alternating thin film layers of metal and dielectric sandwiched between a pair of optical media providing input and output ports. The thicknesses of said layers and the optical constants of said layers and said optical media are selected such that the equivalent admittance of said functional core substantially matches the admittance of said optical media for one plane of polarization, thus allow light with said polarization to be transmitted, and has substantially only an imaginary part for the other plane of polarization, thus allows light with the other polarization to be reflected, at predetermined wavelengths and angles of incidence.
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