Abstract

Striving for nanometer-sized solid-state single-photon sources, we investigate atom-like quantum emitters based on single germanium-vacancy (GeV) centers isolated in crystalline nanodiamonds (NDs). Cryogenic characterization indicated symmetry-protected and bright (>106 counts/s with off-resonance excitation) zero-phonon optical transitions with up to 6-fold enhancement in energy splitting of their ground states as compared to that found for GeV centers in bulk diamonds (i.e. up to 870 GHz in highly strained NDs vs. 150 GHz in bulk). Utilizing lithographic alignment techniques, we demonstrate an integrated nanophotonic platform for deterministic interfacing plasmonic waveguides with isolated GeV centers in NDs, which enables 10-fold enhancement of single-photon decay rates along with the emission direction control by judiciously designing and positioning a Bragg reflector. This approach allows one to realize the unidirectional emission from single-photon dipolar sources, thereby opening new perspectives for the realization of quantum optical integrated circuits.

Details

Title
Ultrabright single-photon emission from germanium-vacancy zero-phonon lines: deterministic emitter-waveguide interfacing at plasmonic hot spots
Author
Siampour, Hamidreza  VIAFID ORCID Logo  ; Wang, Ou; Zenin, Vladimir A; Boroviks, Sergejs; Siyushev, Petr; Yang, Yuanqing  VIAFID ORCID Logo  ; Davydov, Valery A; Kulikova, Liudmila F; Agafonov, Viatcheslav N; Kubanek, Alexander; Mortensen, N Asger; Jelezko, Fedor; Bozhevolnyi, Sergey I
Pages
953-962
Publication year
2020
Publication date
2020
Publisher
Walter de Gruyter GmbH
ISSN
21928606
e-ISSN
21928614
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1515/nanoph-2020-0036
ProQuest document ID
2394479356
Copyright
© 2020. This work is published under http://creativecommons.org/licenses/by/4.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.