Laser spectroscopy of highly doped NV- centers in diamond
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2018-02-20 |
| Authors | Shova Subedi, Jeremy Peppers, Sergey Mirov, Vladimir V. Federov, Dmitry Martyshkin |
| Institutions | Harvard University Press, University of Alabama at Birmingham |
| Citations | 7 |
Abstract
Section titled âAbstractâIn this paper, prospects of using diamond with NVâ centers as a gain medium have been studied. Spectroscopic characterization of NVâ centers in diamond as well as absorption saturation and pump-probe experiments have been carried out. Absorption and emission cross-sections were estimated to be 2.8 × 10<sup>-17</sup> cm<sup>2</sup> and 4.3 × 10<sup>-17 </sup>cm<sup>2</sup> at the maximum of absorption and emission bands, respectively. It was observed from emission spectra under pulse excitation that some NVâ are photoionized to NV<sup>0</sup> centers with ZPL at 575 nm. Room temperature luminescence lifetime of NVâ centers was measured to be 12ns, which is close to the previously reported lifetime in bulk diamond (~13ns). Saturated transmission was only about 11% of calculated values even at energy fluence much higher than the saturation flux. Two excited state absorptions (ESAs) with different relaxation times (âfast-decayâ and âslow-decay with relaxation times of ~500 ns and several tens of microseconds, respectively) were revealed in transmission decay kinetics at 632 nm. Kinetics of transmission at 670 nm was dominated by âslow-decayâ ESA process. Kinetics of <i>dk/k<sub>0</sub> </i>in shorter wavelength were strongly dominated by âfast-decayâ ESA process. These results definitively indicate that stimulated emission of NVâ centers is suppressed by photoionization and ESAs and the possibility of diamond lasers based on NVâ centers is low.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 1995 - Laser modes in diamond