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

Publisher:
SPIE
Publication Type:
Conference Proceeding
Citation:
Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 2011, 7909
Issue Date:
2011-03-21
Full metadata record
Files in This Item:
Filename Description Size
79090H (1).pdfPublished version453.97 kB
Adobe PDF
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 10 4 nm 3 , 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 SPIE.
Please use this identifier to cite or link to this item: