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10 October 2020 Dirac-cone modes free from diffraction loss in SOI photonic crystal slabs
Yuanzhao Yao, Takashi Kuroda, Naoki Ikeda, Takaaki Mano, Hiromi Koyama, Yoshimasa Sugimoto, Kazuaki Sakoda
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Proceedings Volume 11556, Nanophotonics and Micro/Nano Optics VI; 1155607 (2020) https://doi.org/10.1117/12.2575042
Event: SPIE/COS Photonics Asia, 2020, Online Only
Abstract
We recently reported an isotropic linear dispersion relation of a square-lattice photonic crystal slab fabricated in an SOI wafer. The linear dispersion of the square lattice generally suffers from the distortion due to a diffraction loss, which may reduce its performance in expected applications. We present a method to eliminate the diffraction loss and avoid the distortion by using triangular-lattice photonic crystal slabs with the six-fold rotational symmetry. The theoretical results on the dispersion and the angle-resolved reflection spectra obtained by the k-p perturbation theory and the finite element method will be compared with available experimental data.
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Yuanzhao Yao, Takashi Kuroda, Naoki Ikeda, Takaaki Mano, Hiromi Koyama, Yoshimasa Sugimoto, and Kazuaki Sakoda "Dirac-cone modes free from diffraction loss in SOI photonic crystal slabs", Proc. SPIE 11556, Nanophotonics and Micro/Nano Optics VI, 1155607 (10 October 2020); https://doi.org/10.1117/12.2575042
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KEYWORDS
Photonic crystals
Diffraction
Dispersion
Distortion
Reflectance spectroscopy
Security technologies
Electron beam lithography
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