FANO RESONANT OPTICAL COATING
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United States of America
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Mar 24, 2022
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Mar 24, 2022
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An optical coating includes a first resonator with a broadband light absorber. A second resonator includes a narrowband light absorber which is disposed adjacent to and optically coupled to the broadband light absorber. The phase of light reflected from the first resonator slowly varies as a function of wavelength compared to the rapid phase change of the second resonator which exhibits a phase jump within the bandwidth of the broadband light absorber. A thin film optical beam spitter filter coating is also described.
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