4.6 Article

Highly tunable optical activity in planar achiral terahertz metamaterials

Journal

OPTICS EXPRESS
Volume 18, Issue 13, Pages 13425-13430

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.18.013425

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Funding

  1. U.S. National Science Foundation
  2. Engineering and Physical Sciences Research Council, UK
  3. Engineering and Physical Sciences Research Council [EP/G060363/1] Funding Source: researchfish
  4. Directorate For Engineering
  5. Div Of Industrial Innovation & Partnersh [0832304] Funding Source: National Science Foundation
  6. EPSRC [EP/G060363/1] Funding Source: UKRI

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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. (C) 2010 Optical Society of America

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