Deep diamond single-photon sources prepared by a femtosecond laser
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2021-08-11 |
| Journal | Optics Letters |
| Authors | Si Gao, ZhenāNan Tian, Pei Yu, Haoyu Sun, Hua Fan |
| Institutions | Jilin University, University of Science and Technology of China |
| Citations | 8 |
Abstract
Section titled āAbstractāNitrogen-vacancy color centers (NVs) in diamond have several potential applications ranging from quantum computing to data storage. However, artificial NVs are often close to the surface, which limits their spatial density and applicability. Here we demonstrate an effective and precise method for preparing deep single NVs in diamond. The method is based on a spatial-shaped femtosecond laser to overcome laser defocus in high-refractive materials, and realizes the preparation of single NVs at 95 Āµm. In addition, owing to the good energy distribution of the shaped laser focus, the single NVs exhibit a statistic yield of <mml:math xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā display=āinlineā> <mml:mrow class=āMJX-TeXAtom-ORDā> <mml:mn>56</mml:mn> </mml:mrow> <mml:mi mathvariant=ānormalā>%</mml:mi> <mml:mo>Ā±</mml:mo> <mml:mrow class=āMJX-TeXAtom-ORDā> <mml:mn>11</mml:mn> </mml:mrow> <mml:mi mathvariant=ānormalā>%</mml:mi> </mml:math> with excellent qualities. This processing method will contribute to the integration of color centers with emerging optical elements and high-density data storage.