Open AccessResonant absorption and scattering suppression of localized surface plasmons in Ag particles on green LED
Author(s) -
Shuang Jiang,
Zhe Da Hu,
Zhizhong Chen,
Xingxing Fu,
Xiaomin Jiang,
Qianqian Jiao,
Tongjun Yu,
Guoyi Zhang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.012100
Subject(s) - materials science , photoluminescence , surface plasmon , optics , scattering , annealing (glass) , transmission electron microscopy , optoelectronics , plasmon , absorption (acoustics) , wafer , wavelength , molecular physics , nanotechnology , chemistry , physics , composite material
The metallic-structure dependent localized surface plasmons (LSPs) coupling behaviors with InGaN QWs in a green LED epitaxial wafer are investigated by optical transmission, scanning electron microscopy (SEM) and photoluminescence (PL) measurements. Ag nanoparticles (NPs) are formed by thermal annealing Ag layer on the green LED wafer. SEM images show that for higher annealing temperature and/or thicker deposited Ag layer, larger Ag NPs can be produced, leading to the redshift of absorption peaks in the transmission spectra. Time resolved PL (TRPL) measurements indicate when LSP-MQW coupling occurs, PL decay rate is greatly enhanced especially at the resonant wavelength 560 nm. However, the PL intensity is suppressed by 3.5 folds compared to the bare LED. The resonant absorption and PL suppression are simulated by three dimension finite-difference-time-domain (FDTD), which suggests that Ag particle with smaller size and lower height lead to the larger dissipation of LSP.