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Evaluation of NV centers in bulk diamond formed by electron beam irradiation
https://repo.qst.go.jp/records/81323
https://repo.qst.go.jp/records/81323e335fdc5-538f-47f1-9058-d6e2d5d0fa90
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-12-14 | |||||
| タイトル | ||||||
| タイトル | Evaluation of NV centers in bulk diamond formed by electron beam irradiation | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Ishii, Shuya
× Ishii, Shuya× Onoda, Shinobu× Saiki, Seiichi× Masuyama, Yuta× Shinei, Chikara× Miyakawa, Masashi× Teraji, Tokuyuki× Ohshima, Takeshi× Shuya, Ishii× Shinobu, Onoda× Seiichi, Saiki× Yuta, Masuyama× Takeshi, Ohshima |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Introduction Negatively charged nitrogen-vacancy (NV-) center in diamond is known as quantum sensor, can be used to measure small changes in physical quantities, such as magnetic field and temperature. To enhance the sensitivity of the quantum sensor, increasing NV- and decreasing neutral charge state NV0 in diamonds are needed since NV0 does not act as quantum sensor. The electron irradiation is a good method to create high concentration of NV centers. The high energy electrons create vacancies in diamond. Annealing allows the vacancies to move and to be trapped by substitutional nitrogen (P1 centers), forming NV centers. In this study, we irradiate diamonds containing different initial P1 concentrations with electrons and evaluate the fluence dependence of the charge state and the amount of created NV centers, for the purpose of determining appropriate fluence to form NV centers efficiently. Method The commercial diamonds synthesized by High Pressure and High Temperature (HPHT) were used. 2 MeV electrons were irradiated with fluences up to 3×1018 cm-2 at room temperature. Then, the samples were annealed at 1000℃ for 2 hours to create NV centers. The concentration of P1 (number of electron spins) was measured by Electron Spin Resonance (ESR). The initial concentration of P1 was in the range from 50 ppm to 100 ppm. The ratio of NV- to NV0 was evaluated from photoluminescence (PL) spectrum. All these measurements were performed at room temperature. Results & Discussion The concentration of P1 decreased with increasing fluence. In contrast, total amount of NV centers increased with increasing fluence and only NV- was detected when the fluence of 3×1018 cm-2. The result suggests that remained P1 centers act as electron donor, and provide electron to NV0. Further irradiation with higher fluence will be needed to achieve the adequate one to maximize NV- concentration for diamonds remaining the charge state only in NV-. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 3rd IFQMS | |||||
| 発表年月日 | ||||||
| 日付 | 2020-12-17 | |||||
| 日付タイプ | Issued | |||||
