photoluminescence

Lattice damage in 9-MeV-carbon irradiated diamond and its recovery after annealing

We have studied the radiation damage in diamond as a function of layer depth upon self-ion implantation with 9-MeV carbon ions and its recovery after annealing at $1000^\circ$C. Raman and photoluminescence spectra show substantial damage of the …

Micro-Raman spectroscopy of near-surface damage in diamond irradiated with 9-MeV boron ions

We have studied the near-surface damage in a diamond crystal caused by irradiation with swift boron ions and its healing after high-temperature annealing. A diamond crystal was irradiated with 9-MeV $^{11}$B$^{3+}$ ions with fluence values between $1 …

Femtosecond laser induced micromodifications in Nd:SBN crystals: Amorphization and luminescence inhibition

We report on femtosecond laser modification of Nd:SBN crystals. Basic properties such as the ablation threshold have been obtained from the analysis of the ablation depths at different laser fluences. The induced micromodifications have been …

Electron-Phonon Coupling in Yb$^{3+}$:LiNbO$_3$ Laser Crystal

Electron-phonon coupling in Yb$^{3+}$:LiNbO$_3$ is studied by comparing the optical (absorption and emission) low-temperature spectra with the room temperature Raman spectrum of undoped LiNbO$_3$. As a result, the whole vibrational structure of the …

Depth-resolved micro-Raman study of porous silicon at different oxidation states

Photoluminescence ~PL! and Raman spectra were measured along a cross section of porous silicon films at different oxidation times after application of anodic current transients. The average crystallite size was determined from the Raman spectra with …