Coherent thermal emission by excitation of magnetic polaritons between periodic strips and a metallic film

B. J. Lee, L. P. Wang, Z. M. Zhang

Research output: Contribution to journalArticlepeer-review

190 Scopus citations

Abstract

The present paper theoretically demonstrates coherent thermal emission in the infrared region by exciting magnetic polaritons between metallic gratings and an opaque metallic film, separated by a dielectric spacer. The coupling of the metallic strips and the film induces a magnetic response that is characterized by a negative permeability and positive permittivity. On the other hand, the metallic film intrinsically exhibits a negative permittivity and positive permeability in the near infrared. This artificial structure is equivalent to a pair of single-negative materials. By exciting surface magnetic polaritons, large emissivity peaks can be achieved at the resonance frequencies and are almost independent of the emission angle. The resonance frequency of the magnetic response can be predicted by an analogy to an inductor and capacitor circuit. The proposed structure can be easily constructed using micro/nanofabrication.

Original languageEnglish (US)
Pages (from-to)11328-11336
Number of pages9
JournalOptics Express
Volume16
Issue number15
DOIs
StatePublished - Jul 21 2008
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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