Pulse-width-induced polarization enhancement of optically pumped N-V electron spin in diamond

Song, Yumeng1; Tian, Yu2,3; Hu, Zhiyi1; Zhou, Feifei1; Xing, Tengteng1; Lu, Dawei2,3; Chen, Bing1; Wang, Ya4,5,6,7; Xu, Nanyang1; Du, Jiangfeng4,5,6,7

2020-08

10.1364/PRJ.386983

Photonics Research   影响因子和分区

2327-9125

The nitrogen-vacancy (N-V) center in diamond is a widely used platform for quantum information processing and sensing. The electron-spin state of the N-V center could be initialized, read out optically, and manipulated by resonate microwave fields. In this work, we analyze the dependence of electron-spin initialization on widths of laser pulses. We build a numerical model to simulate this process and to verify the simulation results in experiments. Both simulations and experiments reveal that shorter laser pulses are helpful to the electron-spin polarization. We therefore propose to use extremely short laser pulses for electron-spin initialization. In this new scheme, the spin-state contrast could be improved about 10% in experiments by using laser pulses as short as 4 ns in width. Furthermore, we provide a mechanism to explain this effect, which is due to the occupation time in the meta-stable spin-singlet states of the N-V center. Our new scheme is applicable in a broad range of N-V-based applications in the future. (C) 2020 Chinese Laser Press

SCI ; EI

英语

其他

National Key Research and Development Program of China[2017YFA0305000][2018YFA0306600][2019YFA0308100] ; Fundamental Research Funds for the Central Universities[PA2019GDQT0023] ; National Natural Science Foundation of China[11604069][11761131011][11775209][11875159] ; CAS[GJJSTD20170001][QYZDY-SSW-SLH004] ; Anhui Initiative in Quantum Information Technologies[AHY050000] ; Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology[2017FXCX005]

Optics

Optics

WOS:000556951400005

OPTICAL SOC AMER

20203809198716

Magnetic moments ; Optical pumping ; Quantum optics ; Spin dynamics ; Spin polarization ; Electrons ; Electrospinning

Magnetism: Basic Concepts and Phenomena:701.2 ; Light/Optics:741.1 ; Lasers, General:744.1 ; Fiber Chemistry and Processing:819.3 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; High Energy Physics:932.1

Web of Science

1.Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
5.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China
6.Univ Sci & Technol China, CAS Key Lab Microscale Magnet Resonance, Hefei 230026, Peoples R China
7.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China

Song, Yumeng,Tian, Yu,Hu, Zhiyi,et al. Pulse-width-induced polarization enhancement of optically pumped N-V electron spin in diamond[J]. Photonics Research,2020,8(8):1289-1295.

Song, Yumeng.,Tian, Yu.,Hu, Zhiyi.,Zhou, Feifei.,Xing, Tengteng.,...&Du, Jiangfeng.(2020).Pulse-width-induced polarization enhancement of optically pumped N-V electron spin in diamond.Photonics Research,8(8),1289-1295.

Song, Yumeng,et al."Pulse-width-induced polarization enhancement of optically pumped N-V electron spin in diamond".Photonics Research 8.8(2020):1289-1295.