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Proceedings Article

Nanoscale plasmonic resonators with high Purcell factor: spontaneous and stimulated emission

[+] Author Affiliations
Ewa M. Goldys, Wei Deng, Nils P. Calander, K. Drozdowicz-Tomsia, Dayong Jin

Macquarie Univ. (Australia)

Proc. SPIE 7909, Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI, 79090H (February 11, 2011); doi:10.1117/12.881170
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From Conference Volume 7909

  • Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI
  • Wolfgang J. Parak; Kenji Yamamoto; Marek Osinski
  • San Francisco, California, USA | January 22, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Ewa M. Goldys ; Wei Deng ; Nils P. Calander ; K. Drozdowicz-Tomsia and Dayong Jin
"Nanoscale plasmonic resonators with high Purcell factor: spontaneous and stimulated emission", Proc. SPIE 7909, Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI, 79090H (February 11, 2011); doi:10.1117/12.881170; http://dx.doi.org/10.1117/12.881170


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