Directional photoluminescence enhancement of organic emitters via surface plasmon coupling
Journal
Applied Physics Letters
Journal Volume
94
Journal Issue
10
Date Issued
2009
Author(s)
Nien S.-Y.
Chiu N.-F.
Ho Y.-H.
Lin J.-R.
Wei M.-K.
Chiu T.-L.
Abstract
In this paper, we had quantitatively investigated the photoluminescence of organic emitter on a Si substrate with periodically corrugated metal thin film experimentally and theoretically. Due to the plasmonic coupling by the metal gratings, 4.3 times and 1.7 times enhancements in optical intensities were observed at specified and full viewing angles at certain wavelengths, respectively. Good agreement of angular-frequency versus in-plane wavevector (ω-k) curves between experiments and calculations were obtained when varying organic materials, metal materials, and grating pitches. Two different metal materials were used, which show slight shift in ω-k curves due to the high sensitivity of the surface plasmon to the relative permittivity. © 2009 American Institute of Physics.
Other Subjects
Metals; Photoluminescence; Plasmons; Semiconducting silicon compounds; Grating pitches; High sensitivities; In planes; Metal gratings; Metal materials; Optical intensities; Organic emitters; Organic materials; Photoluminescence enhancements; Plasmonic couplings; Relative permittivities; Si substrates; Surface plasmon couplings; Surface plasmons; Viewing angles; Wave vectors; Corrugated metal
Type
journal article