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We have fabricated a dielectric reflector and a passband filter, both with first order photonic bandgaps in the middle-infrared region around λ=4μm. The devices were made from alternating amorphous Ge 25 S 75 and Ge 15 Te 85 chalcogenide films with high transparency in the middle infrared region stacked in multilayers. Due to high thickness accuracy and periodicity...
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