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25 February 2014 High absorption thin-film absorber with gold nanorod arrays
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Thin film absorber structure is becoming one of the hot topics recently for its various sub-wavelength applications such as photo detector, thermo photovoltaic cells, thin-film thermal emitters, and multi-color filters. In this work, we extended the design principles of single band absorbers to tri-band absorbers based on single nanorod unit which exhibits localized surface plasmon resonances (LSPs). By varying the geometric parameters of nanorod arrays, the absorption spectrum can be tailored. Detailed study was carried out by using finite difference time domain (FDTD) method to reveal the mechanism of high absorption. Even broader absorption could be realized based on this work.
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Guangyao Su, Deng Xiao, Chuanhong Liu, Fangwang Gou, and Zhaoyu Zhang "High absorption thin-film absorber with gold nanorod arrays", Proc. SPIE 8994, Photonic and Phononic Properties of Engineered Nanostructures IV, 899423 (25 February 2014);

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