title: Enhancement of light emission from nanostructured In(2)O(3) via surface plasmons.
abstract: We report the construction of In(2)O(3)/Ag/In(2)O(3) sandwich nanostructures and realization of effective coupling with surface plasmon (SP) modes. An enhancement of photoluminescence as large as 278-fold is achieved for the new nanostructures, while only eightfold is obtained from bilayer structures. The advancement of the nanostructures is that both the frequency of incidence photons and the in-plane wavevector of the excited SP modes along each side of the sandwiched nanometer metal layer are identical, thus the momenta mismatch between two SP modes which inevitably occurs in commonly used metal/dielectric bilayer structures is no longer a problem. The fulfillment of the cross coupling and resonance conditions of the two SP modes leads to the tremendous amplification of light emission. Such sandwich nanostructures can be readily extended to other dielectric/metal/dielectric nanomaterial combinations and identified as technologically useful for SP mediated light emitting devices.
authors.affiliation: Department of Physics, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China.
authors.forename: Dongjiang
authors.initials: D
authors.lastname: Qiu
authors.forename: Zhengfen
authors.initials: Z
authors.lastname: Wan
authors.forename: Xikun
authors.initials: X
authors.lastname: Cai
authors.forename: Zijian
authors.initials: Z
authors.lastname: Yuan
authors.forename: Lian
authors.initials: L
authors.lastname: Hu
authors.forename: Bingpo
authors.initials: B
authors.lastname: Zhang
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Cai
authors.forename: Huizhen
authors.initials: H
authors.lastname: Wu