Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials

Tun Cao; Lei Zhang; Robert E. Simpson; Chenwei Wei; Martin J. Cryan

doi:10.1364/OE.21.027841

Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials

Tun Cao, Lei Zhang, Robert E. Simpson, Chenwei Wei, Martin J. Cryan

Research output: Contribution to journal › Article (Academic Journal) › peer-review

112 Citations (Scopus)

Abstract

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 Ge₂Sb₂Te ₅ under a low incident light intensity of 0.016mW/μm².

Original language	English
Pages (from-to)	27841-27851
Number of pages	11
Journal	Optics Express
Volume	21
Issue number	23
DOIs	https://doi.org/10.1364/OE.21.027841
Publication status	Published - 18 Nov 2013

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Photonics and Quantum

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title = "Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials",

abstract = "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 Ge2Sb2Te 5 under a low incident light intensity of 0.016mW/μm2.",

author = "Tun Cao and Lei Zhang and Simpson, \{Robert E.\} and Chenwei Wei and Cryan, \{Martin J.\}",

year = "2013",

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T1 - Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials

AU - Cao, Tun

AU - Zhang, Lei

AU - Simpson, Robert E.

AU - Wei, Chenwei

AU - Cryan, Martin J.

PY - 2013/11/18

Y1 - 2013/11/18

N2 - 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 Ge2Sb2Te 5 under a low incident light intensity of 0.016mW/μm2.

AB - 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 Ge2Sb2Te 5 under a low incident light intensity of 0.016mW/μm2.

UR - http://www.scopus.com/inward/record.url?scp=84888256946&partnerID=8YFLogxK

U2 - 10.1364/OE.21.027841

DO - 10.1364/OE.21.027841

M3 - Article (Academic Journal)

C2 - 24514301

AN - SCOPUS:84888256946

SN - 1094-4087

VL - 21

SP - 27841

EP - 27851

JO - Optics Express

JF - Optics Express

IS - 23

ER -

Strongly tunable circular dichroism in gammadion chiral phase-change metamaterials

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