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Proceedings Paper

Design and performance of a wide-angle infrared plasmonic absorber
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Paper Abstract

We study theoretically and experimentally a wide-angle infrared absorber constituting of a periodic array of rectangular metal patches on a thick metal layer, which were spaced by an ultrathin dielectric layer. We use a cavity plasmon resonator (CPR) model to describe the cavity mode field distribution in the absorber analytically and to analyze the resonant conditions and resonant absorption. A plasmonic absorber with square patches is numerically simulated and analyzed based on the CPR model, which shows that the absorption of the absorber is independent of the azimuth angle and remains high at moderate incident angles (θ ≤ 60° ) for both p and s polarizations. The dependence of the resonant wavelength and absorption on the geometric parameters and material of the structure is also investigated, with some design principles proposed for the parameter choice. As a proof-of-principle experiment, we design, fabricate and measure a sample, which shows over 85.7% absorption in the incident angle range of 20°~50° around the wavelength 1160nm for p-polarized incidence, and over 70% absorption around the wavelength 1135 nm for s-polarized incidence.

Paper Details

Date Published: 21 August 2014
PDF: 10 pages
Proc. SPIE 9283, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, 92830U (21 August 2014); doi: 10.1117/12.2067776
Show Author Affiliations
Xianshun Ming, Tsinghua Univ. (China)
Qiaofeng Tan, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 9283:
7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems
Tianchun Ye; A. G. Poleshchuk; Song Hu, Editor(s)

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