Femtosecond laser processing for single NV-waveguide integration in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-06-01 |
| Authors | BelƩn Sotillo, Vibhav Bharadwaj, John P. Hadden, Stefano Rampini, Andrea Chiappini |
| Institutions | Institute for Microelectronics and Microsystems, Center for Nano Science and Technology |
Abstract
Section titled āAbstractāSummary form only given. Diamond is an exceptional material due to its hardness, high thermal conductivity and transparency from the UV to far IR. Recently it has caught the attention of the scientific community because it is the host of different color centers that can be used for magnetic sensing applications and quantum computing [1]. One of the most promising of these defects is the nitrogen-vacancy (NV) center. The electrons of the NV center, largely localized at the vacancy site, combine to form a spin triplet, which can be polarized with 532-nm laser light. The NVās states are isolated from environmental perturbations, making their spin coherence times long even at room temperature. The NVs can be easily initialized, manipulated and read out using light. Therefore, an important breakthrough would be in connecting, using optical waveguides, multiple diamond NVs. In this work we propose the use of high repetition rate femtosecond laser writing to fabricate buried optical waveguides in diamond. Understanding the effect of the femtosecond laser pulses on the diamond crystal lattice is critical to improve the optical waveguide performance and to obtain NVs with properties as good as in the pristine material. Employing Ī¼Raman spectroscopy, optically detected magnetic resonance and confocal Ī¼Photoluminescence (Ī¼PL) characterization, we showed that in optical grade diamond, the properties of NV centers already present within the laser-written optical waveguides were preserved [3].