科研之友
微信
新浪微博
Facebook
分享链接
摘要
We present a highly sensitive miniaturized cavity-enhanced room-temperature magnetic-field sensor based on nitrogen-vacancy centers in diamond. The magnetic resonance signal is detected by probing absorption on the 1042-nm spin-singlet transition. To improve the absorptive signal the diamond is placed in an optical resonator. The device has a magnetic-field sensitivity of 28 pT/root Hz, a projected photon shot-noise-limited sensitivity of 22 pT/root Hz, and an estimated quantum projection-noise-limited sensitivity of 0.43 pT root Hz with the sensing volume of similar to 390 mu m x 4500 mu m(2). The presented miniaturized device is the basis for an endoscopic magnetic-field sensor for biomedical applications.
- 出版日期2017-10-27
