2017
DOI: 10.1002/ange.201707389
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Far‐UV‐Excited Luminescence of Nitrogen‐Vacancy Centers: Evidence for Diamonds in Space

Abstract: The nitrogen-vacancy (NV) centers in diamond are among the most thoroughly investigated defects in solid-state matter;h owever,o ur understanding of their properties upon far-UV excitation of the host matrix is limited. This knowledge is crucial for the identification of NV as the carrier of extended red emission (ERE) bands detected in aw ide range of astrophysical environments.H erein, we report as tudy on the photoluminescence spectra of NV-containing nanodiamonds excited with synchrotron radiation over the… Show more

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Cited by 7 publications
(17 citation statements)
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“…Continuous-wave green (GR; 532 nm) and near-infrared (NIR; 1064 nm) diode lasers were launched from both ends of the nanofiber. The NVCs exhibit absorption at the GR region but not at the NIR region ( 28 , 29 ). Furthermore, we introduce a weak red laser in the fiber as a probe light (690 nm, 0.1 mW) to monitor the motion of the NDs, which was recorded by an optical microscope equipped with a charge-coupled device (CCD) camera.…”
Section: Resultsmentioning
confidence: 99%
“…Continuous-wave green (GR; 532 nm) and near-infrared (NIR; 1064 nm) diode lasers were launched from both ends of the nanofiber. The NVCs exhibit absorption at the GR region but not at the NIR region ( 28 , 29 ). Furthermore, we introduce a weak red laser in the fiber as a probe light (690 nm, 0.1 mW) to monitor the motion of the NDs, which was recorded by an optical microscope equipped with a charge-coupled device (CCD) camera.…”
Section: Resultsmentioning
confidence: 99%
“…In contrast, the ZPL of NV − was barely detectable at 638 nm, indicating that the originally present NV − centers had been photoionized to form NV 0 during the interband excitation that created electron−hole pairs, which were subsequently recombined upon relaxation. As discussed in our previous work, 21 the energy (∼5.5 eV) released from the electron−hole recombination is sufficient to ionize the negatively charged defects to form electronically excited neutral centers, a process requiring only ∼4.8 eV.…”
Section: Resultsmentioning
confidence: 74%
“…The self-absorption of PL as found for the excitation with visible light is not a concern here, thanks to the small penetration depths of these radiations. 21 Figure 3 displays the measured PLE spectrum, plotted in terms of PL quantum yield versus photon energy. The spectrum was obtained by referring to the PL quantum yield of 0.37 determined previously for the same samples at 170 nm.…”
Section: Resultsmentioning
confidence: 99%
“…2e ). The released photons could excite NV 0 but are unlikely to excite NV − directly since the lower absorption edge of NV − is located in the blue region of the spectrum 26 , 32 . Notably, however, the energy released from this radiative recombination is sufficient to ionize the negatively charged defects, thereby converting NV − to NV 0 , similar to that of far-UV excitation 32 .…”
Section: Resultsmentioning
confidence: 99%
“…The released photons could excite NV 0 but are unlikely to excite NV − directly since the lower absorption edge of NV − is located in the blue region of the spectrum 26 , 32 . Notably, however, the energy released from this radiative recombination is sufficient to ionize the negatively charged defects, thereby converting NV − to NV 0 , similar to that of far-UV excitation 32 . And this could be evidenced by the weakened emission of NV − centers whose phonon sidebands are suppressed under α-particle excitation, compared with the distinct phonon sidebands of NV 0 centers (Fig.…”
Section: Resultsmentioning
confidence: 99%