Journal
LASER & PHOTONICS REVIEWS
Volume 8, Issue 4, Pages 626-632Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201300205
Keywords
flexible metamaterials; terahertz; quarter-wave plate; polarization conversion; broadband
Categories
Funding
- 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
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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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