Enhancement and tunability of active plasmonic by multilayer grating coupled emission.
The effect of coupled mode surface plasmon polaritons (SPPs) on the active emission of a nanostructure grating with organic semiconductor material, Alq(3), on the surface was investigated in this study. We report surface plasmon grating coupled emission (SPGCE) from excited organic layer on metal grating in both organic/metal (2-Layer) and organic/metal/organic/metal (4-Layer) structures. The dispersion relation was obtained from angle-resolved photoluminescence measurement. The resultant emission intensity can have up to 6 times enhancement on the 4- Layer device and the Full-Width Half-Maximum (FWHM) is less than 50 nm. The combination of SPPs on organic/metal interface allows specific directional emission and color appearance of Alq(3) fluorophores. Potential applications of such an active plasmonics with enhanced resonant energy emission due to interactions on the organic/metal nano-grating as biosensor were presented and discussed.
Chiu
Nan-Fu
NF
Yu
Chun
C
Nien
Shou-Yu
SY
Lee
Jiun-Haw
JH
Kuan
Chieh-Hsiung
CH
Wu
Kuang-Chong
KC
Lee
Chih-Kung
CK
Lin
Chii-Wann
CW