title: Polarization-dependent enhanced photoluminescence and polarization-independent emission rate of quantum dots on gold elliptical nanodisc arrays.
abstract: We have fabricated gold (Au) elliptical nanodisc (ND) arrays via three-beam interference lithography and electron beam deposition of gold. The enhanced photoluminescence intensity and emission rate of quantum dots (QDs) near to the Au elliptical NDs have been studied by tuning the nearest distance between quantum dots and Au elliptical NDs. We found that the photoluminescence intensity is polarization-dependent with the degree of polarization being equal to that of the light extinction of the Au elliptical NDs, while the emission rate is polarization-independent. This is resulted from the plasmon-coupled emission via the coupling between the QD dipole and the plasmon nano-antenna. Our experiments fully confirm the evidence of the plasmophore concept proposed recently in the interaction of the QDs with metal nanoparticles.
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China. jinchjun@mail.sysu.edu.cn.
authors.forename: Qiangzhong
authors.initials: Q
authors.lastname: Zhu
authors.forename: Shupei
authors.initials: S
authors.lastname: Zheng
authors.forename: Shijie
authors.initials: S
authors.lastname: Lin
authors.forename: Tian-Ran
authors.initials: TR
authors.lastname: Liu
authors.forename: Chongjun
authors.initials: C
authors.lastname: Jin