We report on an efficient room-temperature source of single photons based on single nitrogen-vacancy centers in nanodiamonds (NDs) placing on a large-area plasmonic platform formed by crystalline gold flakes covered with a thin dielectric layer. Due to the strongly confined plasmonic fields in the thin dielectric layer, the NDs show a large enhancement in the fluorescence intensity without significant degradation in single photon purity. According to the deduced fluorescence lifetime from g(2) measurements, the Purcell factor is estimated to be ∼1.4. The plasmonic platform is very ideal for large-area fluorescence enhancement without the needs of sophisticated nanopositioning schemes for locating NDs at local hot spots in conventional plasmonic nanostructures.
|State||Published - Jun 2014|
|Event||2014 Conference on Lasers and Electro-Optics, CLEO 2014 - San Jose, United States|
Duration: 8 Jun 2014 → 13 Jun 2014
|Conference||2014 Conference on Lasers and Electro-Optics, CLEO 2014|
|Period||8/06/14 → 13/06/14|