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Localized terahertz electromagnetically-induced transparency-like phenomenon in a conductively coupled trimer metamolecule
Zhao, ZY; Zheng, XB; Peng, W; Zhang, JB; Zhao, HW; Luo, ZJ; Shi, WZ
2017
Source PublicationOPTICS EXPRESS
ISSN1094-4087
Volume25Issue:20Pages:24410-24424
Subtype期刊论文
AbstractWe experimentally investigate the terahertz (THz) electromagnetically-induced transparency (EIT)-like phenomenon in a metamolecule (MM) of three-body system. This system involves a couple of geometrically identical split-ring resonators (SRRs) in orthogonal layout conductively coupled by a cut-wire resonator. Such a three-body system exhibits two frequency response properties upon to the polarization of incident THz beam: One is the darkbright- bright layout to the horizontally polarized THz beam, where there is no EIT-like effect; the other is bright-dark-dark layout to the vertically polarized THz beam, where an EIT-like effect is observable. The transparency window can be tuned from 0.71 THz to 0.74 THz by the displacement of cut-wire inside the trimer MM. A maximum of 7.5 ps group delay of THz wave is found at the transparent window of 0.74 THz. When the cut-wire moved to the midpoint of lateral-side of SRR, the EIT-like phenomenon disappears, this leads to a localized THz slow-light effect. The distribution of surface currents and electric energy reveals that the excited inductive-capacitive (LC) oscillation of bright-SRR dominates the high frequency side-mode, which is isolated to the displacement of cut-wire resonator. However, the low frequency side-mode originates from the constructive hybridization of LC resonance in darkSRR coupled with a localized S-shaped dipole oscillator, which is tunable by the displacement of cut-wire. As a consequence, the group delay as well as the spectral configuration of transparency window can be manipulated by tuning one side-mode while fixing the other. Such an experimental finding reveal the EIT-like effect in a conductively coupled three-body system and manifests a novel approach to achieve tunable THz slow-light device. (C) 2017 Optical Society of America
KeywordPlasmon-induced Transparency Split-ring Resonators Irreversible-processes Reciprocal Relations Metamaterial Analog Planar Metamaterial
DOI10.1364/OE.25.024410
Indexed BySCI
WOS KeywordPLASMON-INDUCED TRANSPARENCY ; SPLIT-RING RESONATORS ; IRREVERSIBLE-PROCESSES ; RECIPROCAL RELATIONS ; METAMATERIAL ANALOG ; PLANAR METAMATERIAL
Language英语
WOS IDWOS:000412048500091
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28719
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Zhao, ZY,Zheng, XB,Peng, W,et al. Localized terahertz electromagnetically-induced transparency-like phenomenon in a conductively coupled trimer metamolecule[J]. OPTICS EXPRESS,2017,25(20):24410-24424.
APA Zhao, ZY.,Zheng, XB.,Peng, W.,Zhang, JB.,Zhao, HW.,...&Shi, WZ.(2017).Localized terahertz electromagnetically-induced transparency-like phenomenon in a conductively coupled trimer metamolecule.OPTICS EXPRESS,25(20),24410-24424.
MLA Zhao, ZY,et al."Localized terahertz electromagnetically-induced transparency-like phenomenon in a conductively coupled trimer metamolecule".OPTICS EXPRESS 25.20(2017):24410-24424.
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