Microwave-free imaging magnetometry with nitrogen-vacancy centers in nanodiamonds at near-zero field
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914096925900800 |
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| author | Sengottuvel, Saravanan Dhungel, Omkar Mrózek, Mariusz Wickenbrock, Arne Budker, Dmitry Gawlik, Wojciech Wojciechowski, Adam M. |
| author_facet | Sengottuvel, Saravanan Dhungel, Omkar Mrózek, Mariusz Wickenbrock, Arne Budker, Dmitry Gawlik, Wojciech Wojciechowski, Adam M. |
| contents | Magnetometry using Nitrogen-Vacancy (NV) color centers in diamond predominantly relies on microwave spectroscopy. However, microwaves may hinder certain studies involving biological systems or thin conductive samples. This work demonstrates a wide-field, microwave-free imaging magnetometer utilizing NV centers in nanodiamonds by exploiting the cross-relaxation feature near zero magnetic fields under ambient conditions without applying microwaves. For this purpose, we measure the center shift, contrast, and linewidth of the zero-field cross-relaxation in 140 nm nanodiamonds drop-cast on a current-carrying conductive pattern while scanning a background magnetic field, achieving a sensitivity of 4.5 $\mathrm{μT/\sqrt{Hz}}$. Our work allows for applying the NV zero-field feature in nanodiamonds for magnetic field sensing in the zero and low-field regimes and highlights the potential for microwave-free all-optical wide-field magnetometry based on nanodiamonds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_02199 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Microwave-free imaging magnetometry with nitrogen-vacancy centers in nanodiamonds at near-zero field Sengottuvel, Saravanan Dhungel, Omkar Mrózek, Mariusz Wickenbrock, Arne Budker, Dmitry Gawlik, Wojciech Wojciechowski, Adam M. Quantum Physics Magnetometry using Nitrogen-Vacancy (NV) color centers in diamond predominantly relies on microwave spectroscopy. However, microwaves may hinder certain studies involving biological systems or thin conductive samples. This work demonstrates a wide-field, microwave-free imaging magnetometer utilizing NV centers in nanodiamonds by exploiting the cross-relaxation feature near zero magnetic fields under ambient conditions without applying microwaves. For this purpose, we measure the center shift, contrast, and linewidth of the zero-field cross-relaxation in 140 nm nanodiamonds drop-cast on a current-carrying conductive pattern while scanning a background magnetic field, achieving a sensitivity of 4.5 $\mathrm{μT/\sqrt{Hz}}$. Our work allows for applying the NV zero-field feature in nanodiamonds for magnetic field sensing in the zero and low-field regimes and highlights the potential for microwave-free all-optical wide-field magnetometry based on nanodiamonds. |
| title | Microwave-free imaging magnetometry with nitrogen-vacancy centers in nanodiamonds at near-zero field |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2409.02199 |