The fine structure of the neutral nitrogen-vacancy center in diamond

Nanophotonics

article

Michael S.J. Barson¹  Elmars Krausz²  Neil B. Manson¹  Marcus W. Doherty¹ 

[1] Laser Physics Centre, Research School of Physics and Engineering, Australian National University;Research School of Chemistry, Australian National University

关键词: nitrogen-vacancy (NV);    neutral;    diamond;    color;    center;    magnetic circular dichroism (MCD);    spectroscopy;    spin-orbit;    fine structure;   

DOI  :  10.1515/nanoph-2019-0142

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The nitrogen-vacancy (NV) center in diamond is a widely utilized system due to its useful quantum properties. Almost all research focuses on the negative charge state (NV − ) and comparatively little is understood about the neutral charge state (NV 0 ). This is surprising as the charge state often fluctuates between NV 0 and NV − during measurements. There are potentially under-utilized technical applications that could take advantage of NV 0 , either by improving the performance of NV 0 or utilizing NV − directly. However, the fine structure of NV 0 has not been observed. Here, we rectify this lack of knowledge by performing magnetic circular dichroism measurements that quantitatively determine the fine structure of NV 0 . The observed behavior is accurately described by spin-Hamiltonians in the ground and excited states with the ground state yielding a spin-orbit coupling of λ  = 2.24 ± 0.05 GHz and a orbital g -factor of 0.0186 ± 0.0005. The reasons why this fine structure has not been previously measured are discussed and strain-broadening is concluded to be the likely reason.

【 授权许可】

CC BY