Polarization-insensitive complementary metamaterial structure based on graphene for independently tuning multiple transparency windows

doi:10.1088/1674-1056/abb307

中国物理B ›› 2020, Vol. 29 ›› Issue (11): 114203-.doi: 10.1088/1674-1056/abb307

Hailong Huang(黄海龙)¹^,², Hui Xia(夏辉)², Hongjian Li(李宏建)²^,†()

收稿日期:2020-05-24 修回日期:2020-08-19 接受日期:2020-08-27 出版日期:2020-11-05 发布日期:2020-11-03

Polarization-insensitive complementary metamaterial structure based on graphene for independently tuning multiple transparency windows

Hailong Huang(黄海龙)^1,2, Hui Xia(夏辉)², and Hongjian Li(李宏建)^{2, †}

1 The Research Department, Beijing Zhongkexin Electronics Equipment Co. Ltd, Beijing 101111, China
2 School of Physics and Electronics, Central South University, Changsha 410083, China

Received:2020-05-24 Revised:2020-08-19 Accepted:2020-08-27 Online:2020-11-05 Published:2020-11-03
Contact: ^†Corresponding author. E-mail: lihj398@126.com
Supported by:
the National Natural Science Foundation of China (Grant No. 61275174).

摘要/Abstract

Abstract:

Polarization-insensitive multiple transparency windows are obtained with a graphene-based complementary metamaterial structure in terahertz regions, which is composed of two kinds of monolayer graphene perforated in shapes of a cross and four identical split rings that construct a resonator. The geometric parameters of resonators are different from each other. Numerical and theoretical results show that the quantum effect of Autler–Townes splitting is the key factor for appearance of transparency windows within the resonant dips. Further investigation demonstrates that by employing the fourfold-symmetry graphene complementary structure, polarization-independent transparency windows can be achieved. Moreover, multiple transparency windows can be separately manipulated over a broad frequency range via adjusting the chemical potential of the corresponding graphene resonators, and the bandwidth as well as resonance strength can also be tuned by changing the relative displacement between resonators each consisting of a cross and four split rings. The proposed metamaterial structure may be utilized in some practical applications with requirements of no polarization-varied loss and slowing the light speed.

Key words: graphene, polarization-independent, multiple transparency windows

Hailong Huang(黄海龙), Hui Xia(夏辉), Hongjian Li(李宏建). [J]. 中国物理B, 2020, 29(11): 114203-.

Hailong Huang(黄海龙), Hui Xia(夏辉), and Hongjian Li(李宏建). Polarization-insensitive complementary metamaterial structure based on graphene for independently tuning multiple transparency windows[J]. Chin. Phys. B, 2020, 29(11): 114203-.

图/表 7

参考文献 35

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Variable d₁/mm	ω_{D, 1}/ω_{D, 2}/THz	ω_{Q, 1}/ω_{Q, 2}/THz	g₁/g₂/THz	γ_{D, 1}/γ_{D, 2}/THz	γ_{Q, 1}/γ_{Q, 1}/THz	κ₁/κ₂/THz
90(d₂ = 60)	11.28/15.87	11.46/15.56	0.11/0.03	0.28/0.09	0.15/0.05	4.89/3.45
100(d₂ = 60)	11.51/15.81	11.65/15.68	0.16/0.03	0.25/0.07	0.13/0.04	4.42/3.45
110(d₂ = 60)	11.72/15.83	11.79/15.62	0.18/0.03	0.24/0.05	0.12/0.03	4.03/3.45
120(d₂ = 60)	11.95/15.79	11.83/15.60	0.21/0.03	0.21/0.03	0.10/0.01	3.72/3.45

Variable d₁/mm	ω_{D, 1}/ω_{D, 2}/THz	ω_{Q, 1}/ω_{Q, 2}/THz	g₁/g₂/THz	γ_{D, 1}/γ_{D, 2}/THz	γ_{Q, 1}/γ_{Q, 1}/THz	κ₁/κ₂/THz
60(d₁ = 90)	11.28/15.87	11.46/15.56	0.11/0.03	0.28/0.09	0.15/0.05	4.89/3.45
70(d₁ = 90)	12.13/15.91	11.56/15.68	0.11/0.08	0.23/0.06	0.14/0.04	4.89/3.01
80(d₁ = 90)	12.21/15.98	11.67/15.62	0.11/0.12	0.20/0.04	0.10/0.03	4.89/2.86
90(d₁ = 90)	12.36/16.13	11.96/15.60	0.11/0.15	0.18/0.02	0.07/0.02	4.89/2.12

Polarization-insensitive complementary metamaterial structure based on graphene for independently tuning multiple transparency windows

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