Random laser action in dielectric-metal-dielectric surface plasmon waveguides

Ashwani Kumar, Siu Fung Yu, X. F. Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


A dielectric-metal-dielectric (DMD) surface plasmon (SP) waveguide, in which the top and bottom dielectric layers are incorporated with scatters and optical gain, respectively, was realized to support random lasing action. For the DMD waveguide under 532 nm optical excitation, sharp peaks at around 590 nm were observed from the edge of the top dielectric layer. Furthermore, the number of sharp peaks increases with the pump intensity. The dependence of lasing threshold on the excitation area also agrees with the random laser theory. Hence, it is verified that the SP waves, which supported inside the DMD waveguide, exhibit random lasing action.
Original languageEnglish
Article number231114
JournalApplied Physics Letters
Issue number23
Publication statusPublished - 18 Dec 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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