Study of the Absorption Spectrum in Mid-IR Range Using Concentric Tubes Metamaterial Structures

Abstract

We theoretically propose Si based concentric tubes meta material absorber, comprised from consecutive concentric tubes of intrinsic Si and doped Si (D-Si) layers. Our proposed structure exhibits broadband performance within the mid IR wavelength range extending from 3 to 7 μm with an absorption more than 0.89 in case of S-polarized incident light. The proposed design reveals new avenues to realize Si/D-Si concentric tubes metamaterial absorber for mid IR photo detection and mid IR thermal harvesting applications.