Charge state control of nitrogen-vacancy optical center in diamond

Physical and Analytical Chemistry Seminar

Lecturer: Sergey Elfimchev

29-29 Jan 2019 @ 15:30

Location: Faculty Seminar Room


Nitrogen-vacancies () in the diamond lattice have been extensively studied in the past for several reasons.  centers can act as single photon emitters in the visible range with absolute photo stability at room temperature. They have found applications in novel fields like quantum computation and single-spin magnetometry due to the possibility to prepare and read out their corresponding spin state optically and because of long spin coherence times.  centers occur in several charged states, where the neutral () and the negatively charged () states are the most common ones.  is the prevailing state for centers buried deep in high-purity material. However, it has been observed to become unstable and to turn into  close to the surface of diamonds. The charge state control of the  center became a crucial engineering and scientific challenge. In the last few years, it was reported that charge-state changes between  and  can be induced by laser illumination, surface termination, and combined of various optical and electrical operations. This work is a review of the recent status for  charge state control ability with respect to different applications.



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