Purcell-enhanced emission from individual SiV− center in nanodiamonds coupled to a Si3N4-based, photonic crystal cavity
Open Access
- 10 July 2020
- journal article
- research article
- Published by Walter de Gruyter GmbH in Nanophotonics
- Vol. 9 (11), 3655-3662
- https://doi.org/10.1515/nanoph-2020-0257
Abstract
Hybrid quantum photonics combines classical photonics with quantum emitters in a postprocessing step. It facilitates to link ideal quantum light sources to optimized photonic platforms. Optical cavities enable to harness the Purcell-effect boosting the device efficiency. Here, we postprocess a free-standing, crossed-waveguide photonic crystal cavity based on Si3N4 with SiV− center in nanodiamonds. We develop a routine that optimizes the overlap with the cavity electric field utilizing atomic force microscope (AFM) nanomanipulation to attain control of spatial and dipole alignment. Temperature tuning further gives access to the spectral emitter-cavity overlap. After a few optimization cycles, we resolve the fine-structure of individual SiV− centers and achieve a Purcell enhancement of more than 4 on individual optical transitions, meaning that four out of five spontaneously emitted photons are channeled into the photonic device. Our work opens up new avenues to construct efficient quantum photonic devices.Funding Information
- Verein Deutscher Ingenieure, Germany
- Russian Foundation for Basic Research, Russia, Germany (18-03-00936)
- Deutsche Forschungsgemeinschaft (398628099)
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