The influence of period between U-shaped resonators on metasurface response at terahertz frequency range

Abstract

In this paper we study the influence of the period between U-shaped split-ring resonators (SRRs) on the transmission/absorbtion properties and refraction index of metasurfaces in THz frequency range (0.1 -1 THz) using experiments and numerical simulations. The metasurfaces are formed by U-shaped SRRs arrays. The period varies from 63 to 300 µm The metasurface electromagnetic responses are obtained using terahertz time-domain spectroscopy. The experimental and numerical results reveal the shift in transmission spectra for the metasurface response and the tuning of absorbtion intensity at the period between U-shaped SRRs changing. The notable change in the metasurface refractive index is shown.

Highly collimating micro-LED projection source enabled by metasurface

“…In recent years, metasurfaces have stood out from numerous means of controlling light fields due to their simple structure and ease of integration. Metasurfaces are a new type of two-dimensional artificial structure surface based on the generalized Snell's law, which can achieve precise control of electromagnetic waves [18][19][20][21] . It consists of multiple unit structures arranged in a certain order on a two-dimensional plane.…”