Strong anti-Stokes luminescence from H[sup +]-irradiated diamond.

A strong anti-Stokes luminescence (ASL) peak associated with 3H color centers is observed from H[sup +]-irradiated diamond, when the diamond is excited at 514.5 nm of wavelength. The characteristics of 3H emission spectrum are discussed in terms of the vibrational–electronic interaction in diamond. We consider that the ASL peak is due to simultaneous phonon absorption with photon absorption in the process of electronic excitations. According to the mechanism of the ASL, some weak ASL peaks at the high-energy side of the strong ASL peak have been also found. © 2003 American Institute of Physics. [ABSTRACT FROM AUTHOR]