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Opt Express. 2010 Jun 21;18(13):13425-30. doi: 10.1364/OE.18.013425.

Highly tunable optical activity in planar achiral terahertz metamaterials.

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  • 1School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA. ranjan@lanl.gov

Abstract

Using terahertz time domain spectroscopy we demonstrate tunable polarization rotation and circular dichroism in intrinsically non-chiral planar terahertz metamaterials without twofold rotational symmetry. The observed effect is due to extrinsic chirality arising from the mutual orientation of the metamaterial plane and the propagation direction of the incident terahertz wave.

PMID:
20588473
[PubMed - indexed for MEDLINE]
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