期刊
LASER & PHOTONICS REVIEWS
卷 8, 期 4, 页码 626-632出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201300205
关键词
flexible metamaterials; terahertz; quarter-wave plate; polarization conversion; broadband
资金
- National Basic Research Program of China [2014CB339800]
- National Natural Science Foundation of China [61007034, 61138001, 61107085, 61107053]
- U.S. National Science Foundation [ECCS-1232081]
- Major National Development Project of Scientific Instruments and Equipment of China [2011YQ150021]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1232081] Funding Source: National Science Foundation
Metamaterials offer exciting opportunities that enable precise control of light propagation, its intensity and phase by designing an artificial medium of choice. Inducing birefringence via engineered metamolecules presents a fascinating mechanism to manipulate the phase of electromagnetic waves and facilitates the design of polarimetric devices. In this paper, a high-efficiency, broadband, tunable and flexible quarter-wave plate based on a multilayer metamaterial is presented. Excellent achromatic pi/2 phase retardance with high transmission is observed upon terahertz propagation through the quarter-wave plate. The calculated Stokes parameter represents the output polarization state numerically, indicating an excellent broadband conversion of linearly polarized light into circularly polarized light. The metamaterialbased quarter-wave plate demonstrated in this work could be an important step forward in the development of functional terahertz polarization conversion devices for practical applications.
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