Bilayer-fish-scale ultrabroad terahertz bandpass filter

Xueqian Zhang; Jianqiang Gu; Wei Cao; Jiaguang Han; Akhlesh Lakhtakia; Weili Zhang

doi:10.1364/OL.37.000906

Optics Letters
Vol. 37,
Issue 5,
pp. 906-908
(2012)
•https://doi.org/10.1364/OL.37.000906

Bilayer-fish-scale ultrabroad terahertz bandpass filter

Xueqian Zhang, Jianqiang Gu, Wei Cao, Jiaguang Han, Akhlesh Lakhtakia, and Weili Zhang

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Xueqian Zhang, Jianqiang Gu, Wei Cao, Jiaguang Han, Akhlesh Lakhtakia, and Weili Zhang, "Bilayer-fish-scale ultrabroad terahertz bandpass filter," Opt. Lett. 37, 906-908 (2012)

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Abstract

A bilayer fish-scale metamaterial is experimentally demonstrated to function as a broad bandpass filter in the terahertz regime. The measured 3 dB-bandwidth for normal incidence is 1.13 THz with a high transmittance. The measured transmission spectrum is described well by a model based on an RLC circuit and multiple reflections. The filter is relatively insensitive to incidence angles up to 45°.

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$r$	$R_{u} (Ω)$	$L_{u} (pH)$	$C_{u} (fF)$	$L_{l 1} (pH)$	$R_{l 2} (Ω)$	$L_{l 2} (pH)$	$C_{l 2} (fH)$	$M$
1	13	9	0.31	21	15	11.07	0.56	$- 4.95$
1.2	4	10.8	0.51	25.2	23	19.8	0.55	$- 4.95$
1.6	8.5	12.8	0.6	33.6	15	19.76	1	$- 4.95$

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Optics Letters