Author(s)

Zichun Li, Jinhua Li, Ye Zhang, Yingjiao Zhai, Xueying Chu, Yu Zhang

Corresponding Author

Jinhua Li

ABSTRACT

In this paper, we propose the design of an narrowband absorber based on a Square ring structure metamaterial nanostructure composed of a periodic array of Au Square ring and a gold (Au) film. The proposed structure can achieve a dual-band, nearly perfect absorption with a maximum absorbance of 99% and a full-width-athalf-maximum (FWHM) value that is less than 50 nm in the mid-infrared region. The polarization insensitivity is demonstrated by analyzing the absorption performance with normal incidences for both transverse electric (TE) and transverse magnetic (TM) polarized waves. In addition, we discuss the impact of change the incident angle and Polarization angle on the absorption performance in detail. The proposed narrow, dual-band metamaterial absorber shows promising prospects in applications such as infrared detection and imaging.

KEYWORDS

metamaterial, narrowband, mid-infrared, FWHM