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16 March 2015 Simulation of the influence of asymmetrical metallic apertures of the plasmonic infrared filter
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In recent times, much research in the field of complementary metal oxide semiconductor (CMOS) image sensors (CISs) regarding plasmonic color filters (PCFs) has been reported. In this paper, we investigated the influence of vertically asymmetrical metallic apertures on the extraordinary optical transmission of PCFs. We designed a structural model of the asymmetric cylindrical aperture. In addition, we simulated the spectral variation in the wavelength transmission. For the simulation, we used a commercial computer simulation tool utilizing the FDTD method. SiO2 was used as the substrate insulator, top-side insulator, and the fill material in the cylindrical aperture. We applied Au as the metal layer; dispersion information for Au was derived from the Lorentz–Drude model. We also presented the electric field distribution under several different conditions at the peak wavelength of the calculated transmission spectrum. Furthermore, we determined the transmittance spectral characteristics and the peak transmittance under several different conditions.
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Hong-Kun Lyu, Young-Jin Park, Hui-Sup Cho, Sung-Hyun Jo, and Jang-Kyoo Shin "Simulation of the influence of asymmetrical metallic apertures of the plasmonic infrared filter", Proc. SPIE 9357, Physics and Simulation of Optoelectronic Devices XXIII, 93571W (16 March 2015);

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