تقرير
Parabolic diamond scanning probes for single spin magnetic field imaging
| العنوان: | Parabolic diamond scanning probes for single spin magnetic field imaging |
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| المؤلفون: | Hedrich, N., Rohner, D., Batzer, M., Maletinsky, P., Shields, B. J. |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics, Quantum Physics |
| الوصف: | Enhancing the measurement signal from solid state quantum sensors such as the nitrogen-vacancy (NV) center in diamond is an important problem for sensing and imaging of condensed matter systems. Here we engineer diamond scanning probes with a truncated parabolic profile that optimizes the photonic signal from single embedded NV centers, forming a high-sensitivity probe for nanoscale magnetic field imaging. We develop a scalable fabrication procedure based on dry etching with a flowable oxide mask to reliably produce a controlled tip curvature. The resulting parabolic tip shape yields a median saturation count rate of 2.1 $\pm$ 0.2 MHz, the highest reported for single NVs in scanning probes to date. Furthermore, the structures operate across the full NV photoluminescence spectrum, emitting into a numerical aperture of 0.46 and the end-facet of the truncated tip, located near the focus of the parabola, allows for small NV-sample spacings and nanoscale imaging. We demonstrate the excellent properties of these diamond scanning probes by imaging ferromagnetic stripes with a spatial resolution better than 50 nm. Our results mark a 5-fold improvement in measurement signal over the state-of-the art in scanning-probe based NV sensors. Comment: 8 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.14.064007 |
| URL الوصول: | http://arxiv.org/abs/2003.01733 |
| رقم الأكسشن: | edsarx.2003.01733 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevApplied.14.064007 |
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