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

doi:10.1088/1674-1056/26/1/017301

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.

Keywords: metamaterials subwavelength structures slow light terahertz

Received: 11 August 2016
Revised: 23 September 2016
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	78.67.Pt	(Multilayers; superlattices; photonic structures; metamaterials)

Fund: 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).

Corresponding Authors: Lan Ding, Wen Xu
E-mail: dinglan@ynu.edu.cn;wenxuissp@aliyun.com

Cite this article:

Shu-Lin Wang(王书林), Lan Ding(丁岚), Wen Xu(徐文) Dynamic control of the terahertz rainbow trapping effect based on a silicon-filled graded grating 2017 Chin. Phys. B 26 017301

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

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