Giant Quantum Electrodynamic Effects on Single SiV Color Centers in Nanosized Diamonds

Understanding and mastering quantum electrodynamics phenomena is essential to the development of quantum nanophotonics applications. While tailoring of the local vacuum field has been widely used to tune the luminescence rate and directionality of a quantum emitter, its impact on their transition en...

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Published in:ACS nano Vol. 18; no. 8; pp. 6406 - 6412
Main Authors: Bézard, Malo, Babaze, Antton, Mindarava, Yuliya, Blinder, Rémi, Davydov, Valery Aleksandrovich, Agafonov, Viatcheslav, Esteban, Ruben, Tamarat, Philippe, Aizpurua, Javier, Jelezko, Fedor, Lounis, Brahim
Format: Journal Article
Language:English
Published: United States American Chemical Society 27.02.2024
Subjects:
Acoustics
Mechanics
Physics
Lamb shift
silicon-vacancy centers
quantum electrodynamics
single molecule spectroscopy
nanodiamonds
phonon bottleneck
ISSN:1936-0851, 1936-086X, 1936-086X
Online Access:Get full text
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Summary:Understanding and mastering quantum electrodynamics phenomena is essential to the development of quantum nanophotonics applications. While tailoring of the local vacuum field has been widely used to tune the luminescence rate and directionality of a quantum emitter, its impact on their transition energies is barely investigated and exploited. Fluorescent defects in nanosized diamonds constitute an attractive nanophotonic platform to investigate the Lamb shift of an emitter embedded in a dielectric nanostructure with high refractive index. Using spectral and time-resolved optical spectroscopy of single SiV defects, we unveil blue shifts (up to 80 meV) of their emission lines, which are interpreted from model calculations as giant Lamb shifts. Moreover, evidence for a positive correlation between their fluorescence decay rates and emission line widths is observed, as a signature of modifications not only of the photonic local density of states but also of the phononic one, as the nanodiamond size is decreased. Correlative light–electron microscopy of single SiVs and their host nanodiamonds further supports these findings. These results make nanodiamond-SiVs promising as optically driven spin qubits and quantum light sources tunable through nanoscale tailoring of vacuum-field fluctuations.
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ISSN:1936-0851
1936-086X
1936-086X
DOI:10.1021/acsnano.3c11739