title: Resonant absorption and scattering suppression of localized surface plasmons in Ag particles on green LED.
abstract: 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.
authors.affiliation: School of Physics and State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Jiang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Hu
authors.forename: Zhizhong
authors.initials: Z
authors.lastname: Chen
authors.forename: Xingxing
authors.initials: X
authors.lastname: Fu
authors.forename: Xianzhe
authors.initials: X
authors.lastname: Jiang
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Jiao
authors.forename: Tongjun
authors.initials: T
authors.lastname: Yu
authors.forename: Guoyi
authors.initials: G
authors.lastname: Zhang
mesh_terms: D003116:Color; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D053768:Metal Nanoparticles / Q000737:chemistry*; D012542:Scattering, Radiation; D012666:Semiconductors; D012834:Silver / Q000737:chemistry*
chemical_list: D012834:Silver