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.
@article{arxiv.1111.3836,
title = {Strong Purcell effect observed in single thick shell CdSe/CdS nanocrystals coupled to localized surface plasmons},
author = {D. Canneson and I. Mallek-Zouari and S. Buil and X. Quélin and C. Javaux and B. Mahler and B. Dubertret and J. -P. Hermier},
journal= {arXiv preprint arXiv:1111.3836},
year = {2015}
}