Abstract

We develop a method to control the group delay of electromagnetic waves continuously using a doubly resonant metasurface. The method is based on the dependences of (i) the group velocity in a medium featuring two resonance lines on the resonance linewidths and (ii) the resonance linewidth of a metasurface composed of split-ring resonators on an incidence angle of electromagnetic wave. To verify this method for group-delay control, we design a terahertz metasurface composed of two split-ring resonators with different resonance frequencies and numerically analyze the transmission characteristic of the metasurface. Double resonance lines are observed for oblique incidence, and the resonance transmission dips become deeper and broader with increasing the incidence angle. The group delay at around the center frequency of the double resonance lines is found to vary in the range from about 0 s to 20 times the period of the incident wave with the incidence angle. In contrast to a previously reported method for variable control of group delay using electromagnetically-induced-transparency-like metamaterials, a high transmittance is achieved for a small group delay condition.

© 2019 Optical Society of America

Polarization-controlled electromagnetically induced transparency analogue based on multipolar resonances

Ying Cui, Xiaosai Wang, Bin Ren, and Yongyuan Jiang
Opt. Mater. Express 12(9) 3738-3748 (2022)

Tailoring slow light with a metal–graphene hybrid metasurface in the terahertz regime

Shuyuan Xiao, Tingting Liu, Chaobiao Zhou, Xiaoyun Jiang, Le Cheng, and Chen Xu
J. Opt. Soc. Am. B 36(7) E48-E54 (2019)

Nonbianisotropic complementary split ring resonators as angular selective metasurfaces

Pablo Rodríguez-Ulibarri and Miguel Beruete
J. Opt. Soc. Am. B 34(7) D56-D61 (2017)

High-efficiency tunable plasmonically induced transparency-like effect in metasurfaces composed of graphene nano-rings and ribbon arrays and its application

Somayyeh Asgari, Elnaz Shokati, and Nosrat Granpayeh
Appl. Opt. 58(13) 3664-3670 (2019)

All-dielectric metamaterial analogue of electromagnetically induced transparency and its sensing application in terahertz range

Tian Ma, Qiuping Huang, Hongchuan He, Yi Zhao, XIaoxia Lin, and Yalin Lu
Opt. Express 27(12) 16624-16634 (2019)