Nanoscale plasmonic resonators with high Purcell factor

spontaneous and stimulated emission

Ewa M. Goldys, Wei Deng, Nils P. Calander, K. Drozdowicz-Tomsia, Dayong Jin

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

Plasmonic nanoparticles with silver cores and silica shells containing Eu fluorophores near the surface have been produced by wet chemistry method and their spontaneous emission properties characterized. Fluorescence amplification and decreased lifetime is interpreted within the Purcell framework which highlights the role of surface plasmon polariton modes of the nanoparticle. These behave as energy-storing resonators, with values of the Q factor between 50 and 170 at the fluorophore wavelength of 615 nm, and very small mode volumes, in the order of 104 nm3, producing high Purcell factors of over 4000. Comparison of experiment with theoretical calculations by using the Mie theory shows that the values of cavity Q factors are moderated by the nonradiative rate of fluorophore molecules close to metal. The criteria for laser action in such composite nanoparticles are also presented, including lasing frequencies and threshold gain.

Original languageEnglish
Title of host publicationColloidal Quantum Dots/Nanocrystals for Biomedical Applications VI
EditorsWolfgang J. Parak, Kenji Yamamoto, Marek Osinski
Place of PublicationBellingham, Washington
PublisherSPIE
Pages79090H-1-79090H-13
Number of pages13
Volume7909
ISBN (Print)9780819484468
DOIs
Publication statusPublished - 2011
EventColloidal Quantum Dots/Nanocrystals for Biomedical Applications VI - San Francisco, CA, United States
Duration: 22 Jan 201124 Jan 2011

Other

OtherColloidal Quantum Dots/Nanocrystals for Biomedical Applications VI
CountryUnited States
CitySan Francisco, CA
Period22/01/1124/01/11

Keywords

  • plasmonic nanoparticles
  • fluorescence enhancement
  • Purcell factor
  • lasing threshold

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  • Cite this

    Goldys, E. M., Deng, W., Calander, N. P., Drozdowicz-Tomsia, K., & Jin, D. (2011). Nanoscale plasmonic resonators with high Purcell factor: spontaneous and stimulated emission. In W. J. Parak, K. Yamamoto, & M. Osinski (Eds.), Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI (Vol. 7909, pp. 79090H-1-79090H-13). [79090H] Bellingham, Washington: SPIE. https://doi.org/10.1117/12.881170