Nearly polarization-independent absorber consisting of metal-insulator multilayer stacks loaded with a metal patch

Junji Yamauchi; Hiroshi Ito; Naoki Takahashi; Hisamatsu Nakano

doi:10.1117/12.2507374

27 February 2019 Nearly polarization-independent absorber consisting of metal-insulator multilayer stacks loaded with a metal patch

Junji Yamauchi, Hiroshi Ito, Naoki Takahashi, Hisamatsu Nakano

Author Affiliations +

Proceedings Volume 10913, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIII; 109131A (2019) https://doi.org/10.1117/12.2507374
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

An ultra-broadband, nearly polarization-independent absorber is studied numerically, in which an Fe square- patch is periodically placed on Fe-SiO₂ multilayer stacks. Special emphasis is placed on the determination of the patch width, since its optimum width significantly differs from that previously found in a 2D structure. A somewhat wider width leads to a broader bandwidth than that for the 2D structure. Further calculations reveal that the proposed structure operates even for oblique incidence, although the absorption gradually decreases as the angle of incidence is increased. Comparison with a different metal-insulator structure also shows that a comparable performance is obtained for Ti-Al₂O₃.

Citation Download Citation

Junji Yamauchi, Hiroshi Ito, Naoki Takahashi, and Hisamatsu Nakano "Nearly polarization-independent absorber consisting of metal-insulator multilayer stacks loaded with a metal patch", Proc. SPIE 10913, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIII, 109131A (27 February 2019); https://doi.org/10.1117/12.2507374

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