Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/161266
Title: Excited-state optically detected magnetic resonance of spin defects in hexagonal boron nitride
Authors: Mu, Zhao
Cai, Hongbing
Chen, Disheng
Kenny, Jonathan
Jiang, Zhengzhi
Ru, Shihao
Lyu, Xiaodan
Koh, Teck Seng
Liu, Xiaogang
Aharonovich, Igor
Gao, Weibo
Keywords: Science::Physics
Issue Date: 2022
Source: Mu, Z., Cai, H., Chen, D., Kenny, J., Jiang, Z., Ru, S., Lyu, X., Koh, T. S., Liu, X., Aharonovich, I. & Gao, W. (2022). Excited-state optically detected magnetic resonance of spin defects in hexagonal boron nitride. Physical Review Letters, 128(21), 216402-. https://dx.doi.org/10.1103/PhysRevLett.128.216402
Project: NRF2021-QEP2-01- P02 
NRF2021-QEP2-03-P01 
NRF2021-QEP2-03- P10 
2019-0643 (QEP-P2) 
2019-1321 (QEP-P3) 
MOE2016-T3-1- 006 (S) 
Journal: Physical Review Letters 
Abstract: Negatively charged boron vacancy (V_{B}^{-}) centers in hexagonal boron nitride (h-BN) are promising spin defects in a van der Waals crystal. Understanding the spin properties of the excited state (ES) is critical for realizing dynamic nuclear polarization. Here, we report zero-field splitting in the ES of D_{ES}=2160  MHz and its associated optically detected magnetic resonance (ODMR) contrast of 12% at cryogenic temperature. In contrast to nitrogen vacancy (NV^{-}) centers in diamond, the ODMR contrast of V_{B}^{-} centers is more prominent at cryotemperature than at room temperature. The ES has a g factor similar to the ground state. The ES photodynamics is further elucidated by measuring the level anticrossing of the V_{B}^{-} defects under varying external magnetic fields. Our results provide important information for utilizing the spin defects of h-BN in quantum technology.
URI: https://hdl.handle.net/10356/161266
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.128.216402
Schools: School of Physical and Mathematical Sciences 
Research Centres: The Photonics Institute 
Centre for Disruptive Photonic Technologies (CDPT) 
Rights: © 2022 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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