AI Article Synopsis
- Stimulated emission is crucial for laser function, and while negatively charged nitrogen-vacancy (NV) centres have been considered for laser mediums since the 1980s, no confirmed evidence had been found until now.
- Recent research provides both theoretical and experimental proof of stimulated emission from NV centres using light around 700 nm.
- The study highlights the transition from stimulated emission to photoionization as the laser wavelength is decreased and suggests that NV centres could enable the development of diamond lasers, enhancing applications in ultra-precise magnetometry and sensors.
Article Abstract
Stimulated emission is the process fundamental to laser operation, thereby producing coherent photon output. Despite negatively charged nitrogen-vacancy (NV) centres being discussed as a potential laser medium since the 1980s, there have been no definitive observations of stimulated emission from ensembles of NV to date. Here we show both theoretical and experimental evidence for stimulated emission from NV using light in the phonon sidebands around 700 nm. Furthermore, we show the transition from stimulated emission to photoionization as the stimulating laser wavelength is reduced from 700 to 620 nm. While lasing at the zero-phonon line is suppressed by ionization, our results open the possibility of diamond lasers based on NV centres, tuneable over the phonon sideband. This broadens the applications of NV magnetometers from single centre nanoscale sensors to a new generation of ultra-precise ensemble laser sensors, which exploit the contrast and signal amplification of a lasing system.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290152 | PMC |
| http://dx.doi.org/10.1038/ncomms14000 | DOI Listing |
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