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Lifetime-Limited and Tunable Quantum Light Emission in h-BN via Electric Field Modulation

Akbari, Hamidreza and Biswas, Souvik and Jha, Pankaj Kumar and Wong, Joeson and Vest, Benjamin and Atwater, Harry A. (2022) Lifetime-Limited and Tunable Quantum Light Emission in h-BN via Electric Field Modulation. Nano Letters, 22 (19). pp. 7798-7803. ISSN 1530-6984. doi:10.1021/acs.nanolett.2c02163.

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Color-center-based single-photon emitters in hexagonal boron nitride (h-BN) have shown promising photophysical properties as sources for quantum light emission. Despite significant advances toward such a goal, achieving lifetime-limited quantum light emission in h-BN has proven to be challenging, primarily due to various broadening mechanisms, including spectral diffusion. Here, we propose and experimentally demonstrate suppression of spectral diffusion by applying an electrostatic field. We observe both Stark shift tuning of the resonant emission wavelength and emission line width reduction (down to 89 MHz) nearly to the homogeneously broadened lifetime limit. Finally, we find a cubic dependence of the line width with respect to temperature at the homogeneous broadening regime. Our results suggest that field tuning in electrostatically gated heterostructures is promising as an approach to control the emission characteristics of h-BN color centers, removing spectral diffusion and providing the energy tunability necessary for integrate of quantum light emission in nanophotonic architectures.

Item Type:Article
Related URLs:
URLURL TypeDescription
Akbari, Hamidreza0000-0002-6073-3885
Biswas, Souvik0000-0002-8021-7271
Jha, Pankaj Kumar0000-0002-5839-3391
Wong, Joeson0000-0002-6304-7602
Vest, Benjamin0000-0003-3640-4560
Atwater, Harry A.0000-0001-9435-0201
Additional Information:This work was primarily supported by the "Photonics at Thermodynamic Limits" Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0019140, which supported sample fabrication and optical measurements. Support for system application concepts for hBN emitters has been provide by the Boeing Strategic University program. H.A. acknowledges Shahriar Aghaeimeibodi for useful discussions.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0019140
Issue or Number:19
Record Number:CaltechAUTHORS:20221010-454096500.26
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117310
Deposited By: Research Services Depository
Deposited On:12 Oct 2022 23:38
Last Modified:12 Oct 2022 23:38

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