Chalcogenide Glass for Infrared Meta-Absorber

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.