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Negative Refractive Index in Chiral Metamaterials

Shuang Zhang, Yong-Shik Park, Jensen Li, Xinchao Lu, Weili Zhang, and Xiang Zhang
Phys. Rev. Lett. 102, 023901 – Published 12 January 2009
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Abstract

We experimentally demonstrate a chiral metamaterial exhibiting negative refractive index at terahertz frequencies. The presence of strong chirality in the terahertz metamaterial lifts the degeneracy for the two circularly polarized waves and allows for the achievement of negative refractive index without requiring simultaneously negative permittivity and negative permeability. The realization of terahertz chiral negative index metamaterials offers opportunities for investigation of their novel electromagnetic properties, such as negative refraction and negative reflection, as well as important terahertz device applications.

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  • Received 18 August 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.023901

©2009 American Physical Society

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Giving light yet another new twist

Published 12 January 2009

Metamaterials can be designed to rotate light as it passes through them. If the effect is strong enough, it can lead to the material having a negative index of refraction and light bouncing around very differently than expected.

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Authors & Affiliations

Shuang Zhang1, Yong-Shik Park1, Jensen Li1, Xinchao Lu2, Weili Zhang2, and Xiang Zhang1,3,*

  • 1Nanoscale Science and Engineering Center, University of California, 5130 Etcheverry Hall, Berkeley, California 94720-1740, USA
  • 2School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA
  • 3Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road Berkeley, California 94720, USA

  • *To whom correspondence should be addressed. xiang@berkeley.edu

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Issue

Vol. 102, Iss. 2 — 16 January 2009

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