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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 27841–27851

Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials

Tun Cao, Lei Zhang, Robert E. Simpson, Chenwei Wei, and Martin J. Cryan  »View Author Affiliations

Optics Express, Vol. 21, Issue 23, pp. 27841-27851 (2013)

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A metal/phase-change material/metal tri-layer planar chiral metamaterial in the shape of a gammadion is numerically modelled. The chiral metamaterial is integrated with Ge2Sb2Te5 phase-change material (PCM) to accomplish a wide tuning range of the circular dichroism (CD) in the mid-infrared wavelength regime. A photothermal model is used to study the temporal variation of the temperature of the Ge2Sb2Te5 layer and to show the potential for fast switching the phase of Ge2Sb2Te5 under a low incident light intensity of 0.016mW/μm2.

© 2013 Optical Society of America

OCIS Codes
(160.1585) Materials : Chiral media
(160.3918) Materials : Metamaterials
(230.5298) Optical devices : Photonic crystals

ToC Category:

Original Manuscript: August 5, 2013
Revised Manuscript: September 23, 2013
Manuscript Accepted: October 31, 2013
Published: November 6, 2013

Tun Cao, Lei Zhang, Robert E. Simpson, Chenwei Wei, and Martin J. Cryan, "Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials," Opt. Express 21, 27841-27851 (2013)

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