中国物理B ›› 2017, Vol. 26 ›› Issue (1): 17301-017301.doi: 10.1088/1674-1056/26/1/017301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Dynamic control of the terahertz rainbow trapping effect based on a silicon-filled graded grating

Shu-Lin Wang(王书林), Lan Ding(丁岚), Wen Xu(徐文)   

  1. 1. School of Physics and Astronomy, Yunnan University, Kunming 650091, China;
    2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2016-08-11 修回日期:2016-09-23 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: Lan Ding, Wen Xu E-mail:dinglan@ynu.edu.cn;wenxuissp@aliyun.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11304272 and 11574319), the Applied Basic Research Foundation of Yunnan Province, China (Grant No. 2013FD003), and the Young Backbone Teachers Training Program of Yunnan University, Ministry of Science and Technology of China (Grant No. 2011YQ130018).

Dynamic control of the terahertz rainbow trapping effect based on a silicon-filled graded grating

Shu-Lin Wang(王书林)1, Lan Ding(丁岚)1, Wen Xu(徐文)1,2   

  1. 1. School of Physics and Astronomy, Yunnan University, Kunming 650091, China;
    2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2016-08-11 Revised:2016-09-23 Online:2017-01-05 Published:2017-01-05
  • Contact: Lan Ding, Wen Xu E-mail:dinglan@ynu.edu.cn;wenxuissp@aliyun.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11304272 and 11574319), the Applied Basic Research Foundation of Yunnan Province, China (Grant No. 2013FD003), and the Young Backbone Teachers Training Program of Yunnan University, Ministry of Science and Technology of China (Grant No. 2011YQ130018).

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摘要： We theoretically propose a scheme to realize the dynamic control of the properties of the terahertz (THz) rainbow trapping effect (RTE) based on a silicon-filled graded grating (SFGG) in a relatively broad band via optical pumping. Through the theoretical analysis and finite-element method simulations, it is conceptually demonstrated that the band of the RTE can be dynamically tuned in a range of ~0.06 THz. Furthermore, the SFGG can also be optically switched between a device for the RTE and a waveguide for releasing the trapped waves. The results obtained here may imply applications for the tunable THz plasmonic devices, such as on-chip optical buffers, broad band slow-light systems, and integrated optical filters.

关键词: metamaterials, subwavelength structures, slow light, terahertz

Abstract: We theoretically propose a scheme to realize the dynamic control of the properties of the terahertz (THz) rainbow trapping effect (RTE) based on a silicon-filled graded grating (SFGG) in a relatively broad band via optical pumping. Through the theoretical analysis and finite-element method simulations, it is conceptually demonstrated that the band of the RTE can be dynamically tuned in a range of ~0.06 THz. Furthermore, the SFGG can also be optically switched between a device for the RTE and a waveguide for releasing the trapped waves. The results obtained here may imply applications for the tunable THz plasmonic devices, such as on-chip optical buffers, broad band slow-light systems, and integrated optical filters.

Key words: metamaterials, subwavelength structures, slow light, terahertz

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)