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21 May 2014A polarization-sensitive mid-infrared plasmonic absorber for multi-band resonance
The aim of this work is to present a multi-band absorption metamaterials. One dual cross-shape perfect absorber
metamaterials (PAMs) was developed to obtain multi-band spectrum at mid-infrared. The PAMs possess three distinct
resonant peaks standing independently, which are attributed to the polarization sensitive excitation of plasmonic
resonance. The optical parameters retrieved by S-parameters method were investigated, which provides a satisfactory
qualitative description of the multiple-band spectra responses. On the other hand, the near-field plasmonic behaviors and
redistribution of the electromagnetic field were probed theoretically and numerically into the PAMs structure, which also
explains the observed absorption behavior of the PAMs ensemble based upon the microscopic perspective. The multiplex
spectrum enables the infrared perfect absorber metamaterials (PAMs) a powerful tool for direct access to vibrational
fingerprints of single molecular structure.
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Yongqian Li, Binbin Wang, Xiaolun Xu, Lei Su, Zili Zhou, "A polarization-sensitive mid-infrared plasmonic absorber for multi-band resonance," Proc. SPIE 9099, Polarization: Measurement, Analysis, and Remote Sensing XI, 909913 (21 May 2014); https://doi.org/10.1117/12.2050810