Purcell-enhanced emission from individual SiV − center in nanodiamonds coupled to a Si 3 N 4 -based, photonic crystal cavity

Nanophotonics

article

Konstantin G. Fehler¹  Alexander Kubanek¹  Anna P. Ovvyan³  Lukas Antoniuk¹  Niklas Lettner¹  Nico Gruhler³  Valery A. Davydov⁴  Viatcheslav N. Agafonov⁵  Wolfram H.P. Pernice³ 

[1] Institut für Quantenoptik, Universität Ulm;Center for Integrated Quantum Science and Technology (IQst), Ulm University;Institute of Physics and Center for Nanotechnology, University of Münster;L.F. Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences;Université F. Rabelais

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

DOI  :  10.1515/nanoph-2020-0257

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 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 Si 3 N 4 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】

CC BY