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Updated: May 13, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Grain size dependence of surface plasmon enhanced photoluminescence
Xiaoying Xu1, Mitsuru Funato, Yoichi Kawakami
1Institute for Advanced Chemistry and Materials, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, Japan. xux1@ms.ifoc.kyushu-u.ac.jp
Abstract:
Photoluminescence (PL) in the InGaN quantum well based light-emitting diodes (LED) is greatly mediated through the coupling with the Surface Plasmons (SPs) at the interface of the sputtered Ag film. SPs coupled PL is independently tuned through controlling the grain size of the sputtered Ag films. The grain size of ~50 nm exhibits the maximum light extraction efficiency (LEE) at the wavelength of 460 nm. This grain size agrees with the periodic lattice constant of the grating structure in the calculation, where the momentum mismatch between the SPs and the radiative light can be compensated.
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