Aperture array Fabry-Perot interference filter |
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Authors: | Dmitry S Bulgarevich Makoto WatanabeMitsuharu Shiwa |
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Institution: | National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
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Abstract: | We demonstrate effective implementation of the Fabry-Perot interferometer with subwavelength aperture arrays on its two metal mirrors to achieve polarization-independent narrow band-pass filtering. By superimposing of aperture array fundamental resonance transmission with one of the Fabry-Perot interference peaks, the moderate filter insertion loss of −5 dB, narrow band-pass width of 15 μm, and efficient out-of-band rejection within the ∼0.1-3 THz range are reported. The Siemens-star-shaped apertures in arrays play an important role to achieve such polarization independence and small insertion loss. |
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Keywords: | Aperture array Fabry-Perot resonator Interference filter Surface waves Terahertz spectroscopy Microfabrication |
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