Purcell-Enhanced Single-Photon Emission from Nitrogen-Vacancy Centers Coupled to a Tunable Microcavity
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-11-22 |
| Journal | Physical Review Applied |
| Authors | Hanno Kaupp, Thomas HĆ¼mmer, Matthias Mader, Benedikt Schlederer, Julia Benedikter |
| Institutions | University of Stuttgart, Max Planck Institute of Quantum Optics |
| Citations | 102 |
Abstract
Section titled āAbstractāOptical microcavities are a powerful tool to enhance spontaneous emission of\nindividual quantum emitters. However, the broad emission spectra encountered in\nthe solid state at room temperature limit the influence of a cavity, and call\nfor ultra-small mode volume. We demonstrate Purcell-enhanced single photon\nemission from nitrogen-vacancy (NV) centers in nanodiamonds coupled to a\ntunable fiber-based microcavity with a mode volume down to $1.0\,\lambda^{3}$.\nWe record cavity-enhanced fluorescence images and study several single emitters\nwith one cavity. The Purcell effect is evidenced by enhanced fluorescence\ncollection, as well as tunable fluorescence lifetime modification, and we infer\nan effective Purcell factor of up to 2.0. With numerical simulations, we\nfurthermore show that a novel regime for light confinement can be achieved,\nwhere a Fabry-Perot mode is combined with additional mode confinement by the\nnanocrystal itself. In this regime, effective Purcell factors of up to 11 for\nNV centers and 63 for silicon vacancy centers are feasible, holding promise for\nbright single photon sources and efficient spin readout under ambient\nconditions.\n