2018/01/17 by Soya Saijo, Yuichiro Matsuzaki, Saijo, Soya +11 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Force Microscopy Techniques and Applications #High-pressure geophysics and materials #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1801.05865
openalex publication_date 2018/01/17 · openalex created_date 2022/09/27 · openalex updated_date 2026/07/28
Nitrogen-vacancy (NV) centers in diamond are considered sensors for detecting\nmagnetic fields. Pulsed optically detected magnetic resonance (ODMR) is\ntypically used to detect AC magnetic fields; however, this technique can only\nbe implemented after careful calibration that involves aligning an external\nstatic magnetic field, measuring continuous-wave (CW) ODMR, determining the\nRabi frequency, and setting the microwave phase. In contrast, CW-ODMR can be\nsimply implemented by continuous application of green CW laser and a microwave\nfiled. In this letter, we report a method that uses NV centers and CW-ODMR to\ndetect AC magnetic fields. Unlike conventional methods that use NV centers to\ndetect AC magnetic fields, the proposed method requires neither a pulse\nsequence nor an externally applied DC magnetic field; this greatly simplifies\nthe procedure and apparatus needed to implement this method. This method\nprovides a sensitivity of 2.5 \μT/Hz1/2 at room temperature. Thus, this\nsimple alternative to existing AC magnetic field sensors paves the way for a\npractical and feasible quantum sensor.\n