中央研究院 原子與分子科學研究所

The nitrogen-vacancy (NV) centers in diamond are among the most thoroughly investigated defects in the solid state of matter; however, our understanding of their properties upon far-UV excitation of the host matrix is limited.  The knowledge is crucial for the identification of NV as the carrier of extended red emission (ERE) bands detected in a wide range of astrophysical environments.  Here, we report a study on the photoluminescence spectra of NV-containing nanodiamonds excited with synchrotron radiation over the wavelength range of 125 – 350 nm.  We observed, for the first time, the emission at 520 – 850 nm with a quantum yield greater than 20 %.  Our results share multiple similarities with the ERE phenomena, suggesting that nanodiamonds are a common component of dust in space. 

link: 相關連結