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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 23 — Dec. 1, 2012
  • pp: 4883–4885

Porous metal-based multilayers for selective thermal emitters

Shiwei Shu, Lingxia Zheng, Hui Li, Chun Kwan Tsang, Liange Shi, and Yang Yang Li  »View Author Affiliations


Optics Letters, Vol. 37, Issue 23, pp. 4883-4885 (2012)
http://dx.doi.org/10.1364/OL.37.004883


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Abstract

We report the numerical study of a selective thermal emitter based on a metallic multilayered structure consisting of a graded antireflection top layer, a middle layer with uniform porosity (i.e., volume fraction of voids), and a nonporous substrate layer. Simulation results show that the proposed emitters feature an emission edge in near-IR where the emissivity drops from over 0.9 to below 0.1, for both the TE and TM polarizations. Moreover, these desired emission characteristics persist for a wide range of emission angles with the emission edge nearly nonshifted, making the proposed emitters promising for achieving isotropic thermal emission. The designed emitters are particularly attractive for the thermal-photovoltaic applications by suppressing emission below the photovoltaic material bandgap, which is normally in near-IR.

© 2012 Optical Society of America

OCIS Codes
(160.6840) Materials : Thermo-optical materials
(310.3915) Thin films : Metallic, opaque, and absorbing coatings

ToC Category:
Materials

History
Original Manuscript: August 2, 2012
Revised Manuscript: September 28, 2012
Manuscript Accepted: October 16, 2012
Published: November 27, 2012

Citation
Shiwei Shu, Lingxia Zheng, Hui Li, Chun Kwan Tsang, Liange Shi, and Yang Yang Li, "Porous metal-based multilayers for selective thermal emitters," Opt. Lett. 37, 4883-4885 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-23-4883

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