Deformation-Driven Enhancement of Spin Defect Emission in Hexagonal Boron Nitride
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908512072761344 |
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| author | Geng, Jianpei Zhou, Xuankai Gross, Nils Li, Song Kong, Yan Tung Zhang, Jixing Bian, Guodong Ng, San Lam Ho, Cheng-I Denisenko, Andrej Stöhr, Rainer Peng, Ruoming Smet, Jurgen Wrachtrup, Jörg |
| author_facet | Geng, Jianpei Zhou, Xuankai Gross, Nils Li, Song Kong, Yan Tung Zhang, Jixing Bian, Guodong Ng, San Lam Ho, Cheng-I Denisenko, Andrej Stöhr, Rainer Peng, Ruoming Smet, Jurgen Wrachtrup, Jörg |
| contents | The negatively charged boron vacancy (VB-) in hexagonal boron nitride (hBN) has been extensively investigated as it offers a novel playground for two-dimensional quantum sensing, with ultimate proximity to target samples. However, its practical sensitivity is limited by the intrinsically weak photoluminescence of the spin ensemble. Here, we report a photoluminescence enhancement of up to 30 times from VB- centers in suspended regions of hBN compared to those in substrate-supported areas. The key spin properties, such as the optically detected magnetic resonance (ODMR) contrast and linewidth, as well as the spin lifetime, of the VB- centers in this region are well preserved. Detailed investigations, including measurements of zero-field ODMR, Raman spectroscopy, and Kelvin probe force microscopy, reveal a correlation between emission enhancement and local deformation in the sample. It is concluded that the suspended regions exhibit higher local deformation compared to the supported areas, breaking the local symmetry and thereby activating otherwise forbidden or weak optical transitions of the VB- centers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_00912 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Deformation-Driven Enhancement of Spin Defect Emission in Hexagonal Boron Nitride Geng, Jianpei Zhou, Xuankai Gross, Nils Li, Song Kong, Yan Tung Zhang, Jixing Bian, Guodong Ng, San Lam Ho, Cheng-I Denisenko, Andrej Stöhr, Rainer Peng, Ruoming Smet, Jurgen Wrachtrup, Jörg Quantum Physics Materials Science The negatively charged boron vacancy (VB-) in hexagonal boron nitride (hBN) has been extensively investigated as it offers a novel playground for two-dimensional quantum sensing, with ultimate proximity to target samples. However, its practical sensitivity is limited by the intrinsically weak photoluminescence of the spin ensemble. Here, we report a photoluminescence enhancement of up to 30 times from VB- centers in suspended regions of hBN compared to those in substrate-supported areas. The key spin properties, such as the optically detected magnetic resonance (ODMR) contrast and linewidth, as well as the spin lifetime, of the VB- centers in this region are well preserved. Detailed investigations, including measurements of zero-field ODMR, Raman spectroscopy, and Kelvin probe force microscopy, reveal a correlation between emission enhancement and local deformation in the sample. It is concluded that the suspended regions exhibit higher local deformation compared to the supported areas, breaking the local symmetry and thereby activating otherwise forbidden or weak optical transitions of the VB- centers. |
| title | Deformation-Driven Enhancement of Spin Defect Emission in Hexagonal Boron Nitride |
| topic | Quantum Physics Materials Science |
| url | https://arxiv.org/abs/2509.00912 |