High-Contrast Quantum Imaging with Time-Gated Fluorescence Detection
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-06-11 |
| Journal | Physical Review Applied |
| Authors | Xiang-Dong Chen, Yu Zheng, Du Bo, Deng-Feng LI, Shen Li |
| Institutions | University of Science and Technology of China |
| Citations | 11 |
Abstract
Section titled āAbstractāOptical detection of spin state has been widely used for the solid state spin\nqubit in the application of quantum information processing. The signal contrast\ndetermines the accuracy of quantum state manipulation, sensitivity of quantum\nsensing and resolution of quantum imaging. Here, we demonstrated a time-gated\nfluorescence detection method for enhancing the spin state signal contrast of\nnitrogen vacancy (NV) center in diamond. By adjusting the delay between time\ngate and the excitation laser pulse, we improved both the signal contrast and\nsignal-to-noise ratio for NV spin detection. An enhancement ratio of 1.86 times\nwas reached for the signal contrast. Utilizing the time-gated fluorescence\ndetection, we further demonstrated a high contrast quantum imaging of\nnanoparticleās stray magnetic field. Without any additional manipulation of the\nquantum state, we expect that this method can be used to improve the\nperformance of various applications with NV center.\n