Enhanced Strain Coupling of Nitrogen-Vacancy Spins to Nanoscale Diamond Cantilevers
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-03-18 |
| Journal | Physical Review Applied |
| Authors | Srujan Meesala, Young-Ik Sohn, Haig A Atikian, Samuel Kim, Michael J. Burek |
| Institutions | Harvard University |
| Citations | 88 |
Abstract
Section titled āAbstractāNitrogen vacancy (NV) centers can couple to confined phonons in diamond\nmechanical resonators via the effect of lattice strain on their energy levels.\nAccess to the strong spin-phonon coupling regime with this system requires\nresonators with nanoscale dimensions in order to overcome the weak strain\nresponse of the NV ground state spin sublevels. In this work, we study NVs in\ndiamond cantilevers with lateral dimensions of a few hundred nm. Coupling of\nthe NV ground state spin to the mechanical mode is detected in electron spin\nresonance (ESR), and its temporal dynamics are measured via spin echo. Our\nsmall mechanical mode volume leads to a 10-100X enhancement in spin-phonon\ncoupling strength over previous NV-strain coupling demonstrations. This is an\nimportant step towards strong spin-phonon coupling, which can enable\nphonon-mediated quantum information processing and quantum metrology.\n