Plasmonic effect on performance of random lasers

Wan Zakiah Wan Ismail*, Juliza Jamaludin, Irneza Ismail, Mus'ab Sahrim, Sharma Balakrishnan, Judith Dawes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We investigated the performance of random dye lasers based on metal-fluorophore distance to study the effect of plasmonics through localized surface plasmons. The silver nanoparticles were coated with various silica thicknesses and mixed with Rhodamine 6G in methanol solution to provide gain to the system. The samples were pumped by a Q-Switched Nd:YAG green laser with nanosecond-pulsewidth and the emission light was collected by a spectrometer. The overlapping of extinction spectra of silver nanoparticles/silver-coated silica nanoparticles with the absorption and/or fluorescence of Rhodamine 6G indicates the localized surface plasmon effects. Increasing the metal-fluorophore distance decreases the localized surface plasmon effects result in increase of lasing threshold and decrease of emission peak intensity.

Original languageEnglish
Pages (from-to)1689-1693
Number of pages5
JournalAdvanced Science Letters
Issue number3
Publication statusPublished - Mar 2018


  • Random Lasers
  • Plasmonics
  • Technique of Lasers and Photonics

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