Strong Purcell effect observed in single thick shell CdSe/CdS nanocrystals coupled to localized surface plasmons

Details Strong Purcell effect observed in single thick shell CdSe/CdS nanocrystals coupled to localized surface plasmons Strong Purcell effect observed in single thick shell CdSe/CdS nanocrystals coupled to localized surface plasmons

2011-11-16

arxiv.org/abs/1111.3836v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 7 figures

Scientific paper

High quality factor dielectric cavities designed to a nanoscale accuracy are mostly used to increase the spontaneous emission rate of a single emitter. Here we show that the coupling, at room temperature, between thick shell CdSe/CdS nanocrystals and random metallic films offers a very promising alternative approach. Optical modes confined at the nanoscale induce strong Purcell factors reaching values as high as 60. Moreover the quantum emission properties can be tailored: strong antibunching or radiative biexcitonic cascades can be obtained with high photon collection efficiency and extremely reduced blinking.

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