Abstract
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 language | English |
|---|---|
| Article number | 081913 |
| Journal | Applied Physics Letters |
| Volume | 92 |
| Issue number | 8 |
| DOIs | |
| State | Published - 6 Mar 2008 |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)