Research Papers

Near-perfect absorber of infrared radiation based on Au nanorod arrays

[+] Author Affiliations
Xu Han

Peking University, School of Electronic and Computer Engineering, Nano Opto-Electronics Laboratory, Shenzhen, China

The Chinese University of Hong Kong, School of Science and Engineering, Shenzhen Key Laboratory of Semiconductor Lasers, Shenzhen, China

Fengyun Zhao

Peking University, School of Electronic and Computer Engineering, Nano Opto-Electronics Laboratory, Shenzhen, China

Kebo He, Zhaoyu Zhang

The Chinese University of Hong Kong, School of Science and Engineering, Shenzhen Key Laboratory of Semiconductor Lasers, Shenzhen, China

Zhubing He

South University of Science and Technology of China, Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Solar Spectral Power Generation, Shenzhen, China

J. Nanophoton. 11(1), 016018 (Mar 28, 2017). doi:10.1117/1.JNP.11.016018
History: Received September 8, 2016; Accepted March 14, 2017
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Abstract.  A polarization-independent metamaterial near-perfect absorber is numerically studied in the infrared range in a two-perpendicular-nanorod design. It is shown that the absorptance and the peak wavelength associated with magnetic resonance are sensitive to the nanorod length, the thickness, and the refractive index of the spacer, while only being slightly affected by the period and the distance between neighboring nanorods. This design shows two absorption peaks with absorptance values of 89% and 83% at the wavelengths of 1.24 and 1.46  μm, respectively. Furthermore, the absorptance and the peak wavelength associated with magnetic resonance show negligible dependence on the polarization angle. These properties are advantageous for applications, including thermal sensing and selective emitters in thermophotovoltaics.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Xu Han ; Fengyun Zhao ; Kebo He ; Zhubing He and Zhaoyu Zhang
"Near-perfect absorber of infrared radiation based on Au nanorod arrays", J. Nanophoton. 11(1), 016018 (Mar 28, 2017). ; http://dx.doi.org/10.1117/1.JNP.11.016018


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