Abstract
The multi-channel high-efficiency absorber in the mid-infrared band has broad application prospects. Here, we propose an SiC-photonic crystal (PhC) heterostructure-SiC structure to realize the absorber. The absorption characteristics of the structure are studied theoretically. The results show that the structure can achieve high-efficiency multi-channel absorption in the mid-infrared range. The absorption peaks come from the coupling of the dual Tamm phonon polariton (TPhP) mode formed at the interface between the two SiC layers and the photonic crystal, and the optical Tamm state (OTS) mode formed in the PhC heterostructure. By adjusting the thickness of the air dielectric layer and the period of the PhC in the heterostructure, the mode coupling intensity can be regulated; thereby, the position and intensity of the absorption peak can be adjusted. In addition, the absorption peaks of TE and TM polarized light can be controlled by changing the incident angle. Adjusting the incident angle can also control the excitation and intensity of the epsilon-near-zero (ENZ) phonon polariton mode produced by TM polarized light. This kind of light absorber may have potential applications in sensors, filters, modulators, switches, thermal radiators, and so on.
Highlights
Efficient infrared absorption has a wide range of applications, including sensors [1], photodetectors [2], thermal emitters [3], infrared imaging [4], etc
If a polar dielectric is used to replace the metal of the metal-photonic crystal (PhC) structure, Tamm phonon polariton (TPhP) will be produced similar to Tamm plasmon polariton (TPP) [17]
The upper part is composed of PhC1, an air layer, and PhC2, forming a PhC heterostructure
Summary
Efficient infrared absorption has a wide range of applications, including sensors [1], photodetectors [2], thermal emitters [3], infrared imaging [4], etc. Changing the dielectric layer in the PhC heterostructure can adjust the position and number of OTS resonance peaks and the interaction with other modes, enabling adjustment of the transmission and absorption characteristics of the structure [12]. If a polar dielectric is used to replace the metal of the metal-PhC structure, Tamm phonon polariton (TPhP) will be produced similar to TPP [17]. There are few studies on the multi-channel high-efficiency absorption In this an SiC-PhC structure is designed, and a multiformed by paper, the coupling of OTSheterostructure-SiC and TPhP. Theberesults showby that the number, position, intensity, and thickness layer in peaks the heterostructure, theby incident angle the incident light, couplingof ofthe the air absorption can be controlled adjusting the of period of the PhC, the and the polarization light. The proposed potential applications in sensors, filters, and thermal radiators
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
