| 摘要: |
| 介绍了上海师范大学光学学科团队太赫兹（THz）微纳结构光子学课题组的主要成果：通过改变电磁谐振单元空间对称性,实现不同类型的等离子体诱导透明（PIT）现象,从而实现对太赫兹电磁脉冲群延迟的调控,获得太赫兹波段的慢光效应,同时衍生出了一系列全新的太赫兹光谱现象,拓展了人们对太赫兹PIT成因的认知. 主要内容涵盖如下方面： 非对称近场耦合实现宽频带慢光；导电耦合实现双暗场激发慢光；三体耦合局域化慢光；自互补结构单元实现正负相反的干涉相消共振,获得不同程度的太赫兹慢光；类表面等离子体相互作用获得慢光等. 这些工作实现了太赫兹慢光调控机制的创新. |
| 关键词: 柔性超构表面 太赫兹（THz）波 类局域表面等离子体 等离子体诱导透明（PIT） |
| DOI：10.20192/j.cnki.JSHNU(NS).2024.04.003 |
| 分类号:O439s |
| 基金项目:国家自然科学基金青年基金（61307130,U1631112） |
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| Plasmon-induced transparency effect of flexible terahertz metasurface |
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ZHAO Zhenyu
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College of Mathematics and Science, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| In recent years, the terahertz micro/nano-photonics research group of Shanghai Normal University has carried out a series of research work on the terahertz （THz） plasmon-induced transparency （PIT） using planar metamaterials, which attract highly attention by domestic and international counterparts. This review-paper introduces a variety of PIT phenomena by changing the spatial symmetry of the electromagnetic resonance unit, so as to manipulating the group delay of the terahertz pulse and obtain the slow light effect in the terahertz band. It was combined with the spatial symmetry breaking theory in plane geometry as well as the electromagnetic duality in physics. The major contribution includes： PIT effect via the interaction between dark-and-dark resonators, PIT effect taking place in a three-body system, PIT from a resonator Lorentzian oscillator interference with a Fano-resonator, PIT effect from a resonator interference with its own complementary structure, Maximization of the polarization insensitive THz slow light. Aforementioned works pay a way to the innovations on fundamental physics of terahertz PIT effect. |
| Key words: metamaterial terahertz（THz） wave spoof localized surface plasmon plasmon-induced transparency（PIT） |
