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Polarization-insensitive, wide-angle, high bandwidth vanadium nitride-based infrared nanostructured absorber

Author name : Meshari Alsharari
Publication Date : 2024-08-21
Journal Name : Optical and Quantum Electronics

Abstract

This paper investigates the potential of a transition metal nitride, Vanadium Nitride (VN), in designing a nanostructured absorber for infrared wavelengths. A simple and plain nano circular ring composed of VN is printed over a metal-backed lossy substrate to implement broadband absorber. The proposed VN-based absorber offers an exceptional absorption characteristic across the large operating wavelength from 1000 to 2400 nm with an absorption threshold of 90%. The absorption properties of this VN absorber have also been analyzed by varying the oblique angles of the optical light and it exhibits a good absorption value of more than 70% even at theta = 60 degrees. Due to the symmetry in the nano-ring of VN, it also achieves the polarization-insensitive response by varying the rotation angles (polarization angles). Moreover, the multi-reflection interference theory has been introduced to verify the simulation results of the proposed VN-absorber. Because of its thermal robustness, mechanical stability, and wide absorption bandwidth, it holds promise for applications in solar cells and thermophotovoltaics.

Keywords

Absorber, VN, Polarization insensitive, Metamaterial, Nanostructured

Publication Link

https://doi.org/10.1007/s11082-024-07355-x

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