Highly aligned 2D NV ensemble fabrication from nitrogen-terminated (111) surface. (15th August 2021)

• Record Type: Journal Article
• Authors: Tatsuishi, Tetsuya; Kanehisa, Kyotaro; Kageura, Taisuke; Sonoda, Takahiro; Hata, Yuki; Kawakatsu, Kazuto; Tanii, Takashi; Onoda, Shinobu; Stacey, Alastair; Kono, Shozo; Kawarada, Hiroshi
• Is Part Of: Carbon. Volume 180(2021)
• Page Start: 127
• Page End: 134
• Publication Date: 2021-08-15
• Subjects: Diamond -- NV center -- Nitrogen termination -- (111) diamond surface -- Diamond growth; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2021.04.057
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The nitrogen vacancy (NV) center in diamond is fascinating and has a long spin coherence time. It is applied to magnetic sensors with high sensitivity (∼fT). To achieve a high sensitivity, an aligned NV ensemble is required. This paper presents a new methodology for the fabrication of two-dimensional (2D) aligned NV ensembles by using nitrogen-terminated (111) surface. To realize this, pure diamond growth and high nitrogen coverage on (111) surface were performed. As a result, we have succeeded in producing 2D NV ensembles, with 1 × 10 9 cm −2 . Coherence time T2 was 2.45 μs. Also, Using dynamical decoupling, the decoherence sources were revealed. The alignment ratio along [111] axis was archived 60%. Thermal annealing of the nitrogen termination was introduced to improve the alignment ratio. After that, the alignment rate was up to 73%. This report shows that the aligned 2D NV ensemble has possibility to be applied for multiple quantum devices. Graphical abstract: Image 1 Highlights: 2D aligned nitrogen vacancy ensembles created using nitrogen-terminated (111) surface. Pure diamond growth and high nitrogen coverage were used. The method afforded highly aligned nitrogen vacancy centers. This technique enables nitrogen vacancy centers with multiple quantum application .