posted on 2024-02-23, 13:07authored byZhiyi Hu, Fengjian Jiang, Jingyan He, Yulin Dai, Ya Wang, Nanyang Xu, Jiangfeng Du
Detecting
nuclear spins using single nitrogen-vacancy (NV) centers
is of particular importance in nanoscale science and engineering but
often suffers from the heating effect of microwave fields for spin
manipulation, especially under high magnetic fields. Here, we realize
an energy-efficient nanoscale nuclear-spin detection using a phase-modulation
electron–nuclear double resonance scheme. The microwave field
can be reduced to 1/250 of the previous requirements, and the corresponding
power is over four orders lower. Meanwhile, the microwave-induced
broadening to the line-width of the spectroscopy is significantly
canceled, and we achieve a nuclear-spin spectrum with a resolution
down to 2.1 kHz under a magnetic field at 1840 Gs. The spectral resolution
can be further improved by upgrading the experimental control precision.
This scheme can also be used in sensing microwave fields and can be
extended to a wide range of applications in the future.