结构对太赫兹超材料光调控特性的影响

李晨毓; 杨舟; 周庆莉; 武阿妮; 张存林

doi:10.3788/IRLA201645.0703002

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结构对太赫兹超材料光调控特性的影响

李晨毓, 杨舟, 周庆莉, 武阿妮, 张存林

文章导航 > 红外与激光工程 > 2016 > 45(7): 703002-0703002(5)

李晨毓, 杨舟, 周庆莉, 武阿妮, 张存林. 结构对太赫兹超材料光调控特性的影响[J]. 红外与激光工程, 2016, 45(7): 703002-0703002(5). doi: 10.3788/IRLA201645.0703002

引用本文:

李晨毓, 杨舟, 周庆莉, 武阿妮, 张存林. 结构对太赫兹超材料光调控特性的影响[J]. 红外与激光工程, 2016, 45(7): 703002-0703002(5). doi: 10.3788/IRLA201645.0703002

Li Chenyu, Yang Zhou, Zhou Qingli, Wu A'ni, Zhang Cunlin. Influence of structures on optical modulation in terahertz metamaterials[J]. Infrared and Laser Engineering, 2016, 45(7): 703002-0703002(5). doi: 10.3788/IRLA201645.0703002

Citation:

Li Chenyu, Yang Zhou, Zhou Qingli, Wu A'ni, Zhang Cunlin. Influence of structures on optical modulation in terahertz metamaterials[J]. Infrared and Laser Engineering, 2016, 45(7): 703002-0703002(5). doi: 10.3788/IRLA201645.0703002

结构对太赫兹超材料光调控特性的影响

doi: 10.3788/IRLA201645.0703002

1.
太赫兹光电子学教育部重点实验室,北京市太赫兹波谱与成像重点实验室,首都师范大学物理系,北京 100048

基金项目:

国家自然科学基金（10804077）;北京市科技新星;北京市属高级青年拔尖人才培育计划

详细信息

作者简介:
李晨毓(1989-),女,博士生,主要从事太赫兹光学方面的研究。Email:lichenyu032007@163.com

通讯作者: 周庆莉(1978-),女,副教授,博士,主要从事太赫兹光学方面的研究。Email:qlzhou@cnu.edu.cn

中图分类号: TN21

Influence of structures on optical modulation in terahertz metamaterials

1.
Beijing Key Laboratory for Terahertz Spectroscopy and Imaging,Key Laboratory for Terahertz Optoelectronics,Ministry of Education,Department of Physics,Capital Normal University,Beijing 100048,China

摘要: 利用光泵浦太赫兹探测系统研究了3个基于开口谐振环的超材料的光调制性质。结果表明：当太赫兹波的电场矢量平行于超材料底边，设计太赫兹超材料时，需要避免对称性样品的中间条等长。然而，非对称性的样品存在耦合和劈裂现象。由于不同的共振机制，低频LC共振对光较为敏感。虽然样品由于设计结构的区别使得各自共振峰位有所不同，但它们对光所呈现出的调制特性是相同的。即当太赫兹波的电场矢量平行于超材料两侧的边时，由于结构的原因在透射谱中只有一个透射凹陷，此透射凹陷表现为偶极共振且该偶极共振特性对光激励不敏感。
- 太赫兹超材料 /
- 光激励 /
- 灵敏度
Abstract: By utilizing optical pump terahertz probe spectroscopy, the optical modulated properties of three samples were investigated with terahertz subwavelength structures, which were derived from classical split ring resonators. The obtained results show in the metamaterials design, it is needed to avoid the same length bar in the middle of the symmetric samples due to the fact that the middle bar has less influence on the resonant property when the terahertz electric field vector is parallel to the bottom bar. However, the asymmetric samples exist coupling and splitting phenomenon in transmission spectra. For the different resonance mechanisms, it is found the LC resonance has higher sensitivity than the dipole resonance to the pump excitation. Although different designed structures will exhibit different resonant positions in frequency, the optical modulation behaviors of those samples have one same characterization. That is, when the terahertz electric field vector is parallel to the bilateral bar, there is only one transmission dip because of the structure design and this transmission dip from the dipole resonance is not sensitive to the pump excitation.
- terahertz metamaterial /
- optical excitation /
- sensitivity

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结构对太赫兹超材料光调控特性的影响

doi: 10.3788/IRLA201645.0703002

1. 太赫兹光电子学教育部重点实验室,北京市太赫兹波谱与成像重点实验室,首都师范大学物理系,北京 100048

作者简介:
李晨毓(1989-),女,博士生,主要从事太赫兹光学方面的研究。Email:lichenyu032007@163.com

通讯作者: 周庆莉(1978-),女,副教授,博士,主要从事太赫兹光学方面的研究。Email:qlzhou@cnu.edu.cn

收稿日期: 2015-11-05
修回日期: 2015-12-20
刊出日期: 2016-07-25

基金项目:

国家自然科学基金（10804077）;北京市科技新星;北京市属高级青年拔尖人才培育计划

中图分类号: TN21

关键词:

摘要: 利用光泵浦太赫兹探测系统研究了3个基于开口谐振环的超材料的光调制性质。结果表明：当太赫兹波的电场矢量平行于超材料底边，设计太赫兹超材料时，需要避免对称性样品的中间条等长。然而，非对称性的样品存在耦合和劈裂现象。由于不同的共振机制，低频LC共振对光较为敏感。虽然样品由于设计结构的区别使得各自共振峰位有所不同，但它们对光所呈现出的调制特性是相同的。即当太赫兹波的电场矢量平行于超材料两侧的边时，由于结构的原因在透射谱中只有一个透射凹陷，此透射凹陷表现为偶极共振且该偶极共振特性对光激励不敏感。

English Abstract

Influence of structures on optical modulation in terahertz metamaterials

1. Beijing Key Laboratory for Terahertz Spectroscopy and Imaging,Key Laboratory for Terahertz Optoelectronics,Ministry of Education,Department of Physics,Capital Normal University,Beijing 100048,China

Received Date: 2015-11-05
Rev Recd Date: 2015-12-20
Publish Date: 2016-07-25

Keywords:

Abstract: By utilizing optical pump terahertz probe spectroscopy, the optical modulated properties of three samples were investigated with terahertz subwavelength structures, which were derived from classical split ring resonators. The obtained results show in the metamaterials design, it is needed to avoid the same length bar in the middle of the symmetric samples due to the fact that the middle bar has less influence on the resonant property when the terahertz electric field vector is parallel to the bottom bar. However, the asymmetric samples exist coupling and splitting phenomenon in transmission spectra. For the different resonance mechanisms, it is found the LC resonance has higher sensitivity than the dipole resonance to the pump excitation. Although different designed structures will exhibit different resonant positions in frequency, the optical modulation behaviors of those samples have one same characterization. That is, when the terahertz electric field vector is parallel to the bilateral bar, there is only one transmission dip because of the structure design and this transmission dip from the dipole resonance is not sensitive to the pump excitation.