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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 6 — Jun. 1, 2013
  • pp: 1580–1585

Mid-infrared tunable polarization-independent perfect absorber using a phase-change metamaterial

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


JOSA B, Vol. 30, Issue 6, pp. 1580-1585 (2013)
http://dx.doi.org/10.1364/JOSAB.30.001580


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Abstract

We present the design of a polarization-independent tunable absorbing metamaterial (MM) in the mid-infrared wavelength regime. Our structure is composed of an array of thin gold (Au) squares separated from a continuous Au film by a phase-change material (PCM) layer. It is shown that a 10% tuning of the absorbance peak can be obtained by switching the PCM between its amorphous and crystalline states. The strong absorbance shows a substantial overlap between TE and TM polarization states over a wide range of incident angles. The electric field, magnetic field, and current distributions in the absorber are investigated to further explain the physical origin of the absorption. The study provides a path toward the realization of tunable absorbers for applications, such as selective thermal emitters, sensors, and bolometers.

© 2013 Optical Society of America

OCIS Codes
(260.5740) Physical optics : Resonance
(300.1030) Spectroscopy : Absorption
(160.3918) Materials : Metamaterials

ToC Category:
Materials

History
Original Manuscript: January 15, 2013
Revised Manuscript: April 10, 2013
Manuscript Accepted: April 10, 2013
Published: May 16, 2013

Citation
Tun Cao, Lei Zhang, Robert E. Simpson, and Martin J. Cryan, "Mid-infrared tunable polarization-independent perfect absorber using a phase-change metamaterial," J. Opt. Soc. Am. B 30, 1580-1585 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-6-1580

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