@article{oai:repo.qst.go.jp:00085691,
 author = {Tetsuya, Tatsuishi and Kyotaro, Kanehisa and Taisuke, Kageura and Sonoda, Takahiro and Hata Yuki and Kazuto, Kawakatsu and Tanii, Takashi and Shinobu, Onoda and Stacey, Alastair and Kono, Shozo and Kawarada, Hiroshi and Tetsuya, Tatsuishi and Kyotaro, Kanehisa and Taisuke, Kageura and Yuki, Hata and Kazuto, Kawakatsu and Shinobu, Onoda},
 journal = {Carbon},
 month = {Aug},
 note = {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 × 109 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.},
 pages = {127--134},
 title = {Highly aligned 2D NV ensemble fabrication from nitrogen-terminated (111) surface},
 volume = {180},
 year = {2021}
}