Purcell-enhanced emission from individual SiV− center in nanodiamonds coupled to a Si3N4-based, photonic crystal cavity

Nanophotonics

Agafonov Viatcheslav N.¹  Lettner Niklas²  Kubanek Alexander²  Antoniuk Lukas²  Fehler Konstantin G.²  Ovvyan Anna P.³  Pernice Wolfram H.P.³  Gruhler Nico³  Davydov Valery A.⁴ 

[1] GREMAN, UMR CNRS CEA 6157, Université F. Rabelais, 37200 Tours, France;Institut für Quantenoptik, Universität Ulm, D-89081 Ulm, Germany;Institute of Physics and Center for Nanotechnology, University of Münster, D-48149 Münster, Germany;L.F. Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow 142190, Russia;

关键词: hybrid quantum photonics;    nanodiamonds;    photonic crystal cavity;    silicon nitride photonics;    silicon vacancy center;   

DOI  :  10.1515/nanoph-2020-0257

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown