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We fabricate a multilayer Fabry–Perot filter (FPF) on a GaN-on-silicon platform. Being significantly different from conventional thin film FPFs formed on smooth flat surfaces, this FPF is deposited in a micropit, and takes a suspended GaN membrane as its carrier, which makes the whole structure ultracompact. The reflection spectra of the FPF are characterized by using an angle-resolved microreflection...
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