title: Enhanced lasing assisted by the Ag-encapsulated Au plasmonic nanorods.
abstract: Threshold reduction and emission enhancement were reported for the waveguided random lasing, assisted by the Ag-encapsulated Au nanorods (Au@Ag NRs). The blend of tris(8-hydroxyquinolinato)aluminum (Alq3) and 4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4 H-pyran (DCJTB), which comprise the typical donor-acceptor lasing system, is used as the gain media. Compared with the Ag nanoparticles and Au nanorods, Au@Ag NRs exhibited the broad absorption spectra of localized surface plasmon resonance (LSPR) with multiple peaks, which sufficiently overlapped with both absorption and emission spectra of the donor-acceptor system of the gain media. This unique plasmonic characteristic of Au@Ag NRs leads to the lower lasing threshold and enhances the lasing efficiency by the effects of both enhancement of localized electromagnetic field and scattering.
authors.forename: Shuya
authors.initials: S
authors.lastname: Ning
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Dong
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.forename: Jun
authors.initials: J
authors.lastname: Xi
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.forename: Bo
authors.initials: B
authors.lastname: Jiao
authors.forename: Xun
authors.initials: X
authors.lastname: Hou