A Perfect Wavelength Tunable Absorber in NIR Band
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Key laboratory of spectral imaging technology of Chinese academy of science,Xi’an Institute of Optics precision Mechanic of Chinese Academy of Sciences,Xi’an,Key laboratory of spectral imaging technology of Chinese academy of science,Xi’an Institute of Optics precision Mechanic of Chinese Academy of Sciences,Xi’an,Key laboratory of spectral imaging technology of Chinese academy of science,Xi’an Institute of Optics precision Mechanic of Chinese Academy of Sciences,Xi’an,Key laboratory of spectral imaging technology of Chinese academy of science,Xi’an Institute of Optics precision Mechanic of Chinese Academy of Sciences,Xi’an,Key laboratory of spectral imaging technology of Chinese academy of science,Xi’an Institute of Optics precision Mechanic of Chinese Academy of Sciences,Xi’an

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    Abstract:

    Perfect electromagnetic wave absorber is generally called perfect absorber for short. It can be used in many industries. A perfect absorber which can operate in Near Infrared (NIR) band is studied by finite-different time domain method. The simulation result shows that this perfect absorber can achieve 98% absorbance for a single peak at the wavelength of 1400 nm or more than 90% absorbance for two peaks at the wavelengths of 1320 nm and 1640 nm. The absorption wavelength and absorption width can be tuned by adjusting the resonance cavity structure of the absorber. The perfect electromagnetic wave absorber is a perfect absorber with a back-to-back resonance cavity, which has a very wide application prospect.

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LI Juan, SUN Jian, FU Di, et al. A Perfect Wavelength Tunable Absorber in NIR Band[J]. Infrared,2017,38(11):1~4

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