Experimental investigation of vector static magnetic field detection using an NV center with a single first-shell <sup>13</sup>C nuclear spin in diamond

Experimental investigation of vector static magnetic field detection using an NV center with a single first-shell ¹³C nuclear spin in diamond

Jiang Feng-Jian^†, Ye Jian-Feng, Jiao Zheng, Jiang Jun, Ma Kun, Yan Xin-Hu, Lv Hai-Jiang^‡

(color online) Experimental data demonstrate the hyperfine structure of NV–¹³C via a change in fluorescence detection with 100 sampling points. (a) At relatively high power, the chosen NV–¹³C indicates four resonance frequencies due to hyperfine coupling with a single ¹³C nucleus for a detected magnetic field configuration. (a1)–(a4) The relatively low microwave power reveals doublet transitions of each corresponding resonance line in panel (a) and hyperfine splitting induced by ¹⁴N nucleus. The hyperfine splitting of ground state induced by ¹³C nucleus is 5.3 MHz. The FWHM Γ of CW spectra is about 1.2 MHz.