Localized surface plasmon polaritons in AgSi O2 Ag plasmonic thermal emitter
Journal
Applied Physics Letters
Journal Volume
93
Journal Issue
3
Date Issued
2008
Author(s)
Abstract
The reflection dispersion relation and emission spectra of AgSi O2 Ag trilayer plasmonic thermal emitters with different lattice constant and Ag line width were investigated. The top Ag film is perforated with parallel line-shape hole array. The induced AgSi O2 surface plasmons at both top and bottom AgSi O2 interface are found coupled together. The coupling effect results in the localized surface plasmon polaritons confined at the top AgSi O2 interface which exhibit the Fabry-Ṕrot resonance. The thermal emission peak position coincides with the reflection minimum in the dispersion relation and shifts to long wavelength as the Ag line width increases, which proves that the emission is due to the excitation of localized surface plasmon polaritons. Moreover, the emitted light is polarized perpendicular to the parallel metal lines. © 2008 American Institute of Physics.
Other Subjects
Dispersion (waves); Electric excitation; Emission spectroscopy; Metals; Nuclear physics; Optical data storage; Phonons; Photons; Plasmons; Quantum theory; Reflection; Silver; Solids; Surface plasmon resonance; American Institute of Physics (AIP); Coupling effects; Dispersion relations; Emission peaking; Emission spectrums; Emitted light; Hole arrays; Lattice (CO); Line widths; Localized surface plasmon polaritons; Long wavelength (LW); Metal lines; Polarized perpendicular; Surface plasmons (SP); Trilayer; Silver plating
Type
journal article