Highly coherent thermal emission obtained by plasmonic bandgap structures

Gabriel Biener, Nir Dahan, Avi Niv, Vladimir Kleiner, Erez Hasman

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


We demonstrate an extraordinary quasimonochromatic thermal emission with high spatial coherence length (lc >2400λ) and a quality factor Q=2320 at radiation frequencies that are much smaller than the plasma frequency of metal (ω ωp). This emission is achieved by forming a plasmonic bandgap, which is obtained by a periodic structure on a metallic surface. Such a structure modifies the dynamics of the surface wave and results in a van Hove singularity [Van Hove, Phys. Rev. 89, 1189 (1953)] in the spectral density of states while maintaining a large coherence length.

Original languageEnglish
Article number081913
JournalApplied Physics Letters
Issue number8
StatePublished - 6 Mar 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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