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21 May 2014 A polarization-sensitive mid-infrared plasmonic absorber for multi-band resonance
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Abstract
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, and 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
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