1. Chalcogenide Glass for Infrared Meta-Absorber
- Author
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Ruijia Xu, Pengyu Liu, Yu-Sheng Lin, Shaojun Chen, Zhicheng Lin, Dongyuan Yao, Zefeng Xu, and Xiaocan Xu
- Subjects
Materials science ,Infrared ,business.industry ,Physics::Optics ,Chalcogenide glass ,Molar absorptivity ,Optical switch ,Wavelength ,Dispersion (optics) ,Optoelectronics ,Astrophysics::Earth and Planetary Astrophysics ,business ,Refractive index ,Astrophysics::Galaxy Astrophysics ,Infrared cut-off filter - Abstract
We propose a novel infrared (IR) meta-absorber by using chalcogenide glass (ChG) material. The merits of ChG are zero extinction coefficient, excellent IR transparency, high third-order nonlinearity, adjustable refraction index, dispersion, and energy bandgap in IR wavelength range. Therefore, it is very suitable for the meta-absorber design. This ChG -based meta-absorber is composed of ring-disk nanostructures. The resonant wavelength and intensity of reflection spectra could be tuned by changing the outer ring of ring-disk nanostructures in horizontal and vertical displacements. The maximum quality factor (Q-factor) is 625. These unique characteristics of IR meta-absorber with ring-disk nanostructures can be used as a tunable IR filter and multi-resonance switch. Furthermore, the proposed device exhibits superior electromagnetic behaviors to be used as a high-efficiency environmental sensor.
- Published
- 2019
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