@article{6525,
  author = {J. P. R. Wells and E. D. van Hattum and P. J. Phillips and D. A. Carder and Fhpm Habraken and J. I. Dijkhuis},
  title = {Degenerate four wave mixing spectroscopy of oxygen vibrations in amorphous silicon},
  abstract = {We report on DFWM spectroscopy on the asymmetric stretching mode in a-SiOx with x from 0.1 to 1.11. For a-SiO0.1, a 10 K lifetime of 2.8 ps is obtained using laser-induced transient grating spectroscopy. Two-pulse photon echo measurements reveal phase dynamics having a temperature dependent component due to elastic phonon scattering and an excitation dependent component suggesting the presence of non-equilibrium Si-Si modes. At high excitation densities, the DFWM signal is dominated by a quasi-thermal grating whose population decay is extremely long lived (much greater than 1 ns). This effect is enhanced as the oxygen concentration is increased. (C) 2004 Elsevier B.V. All rights reserved.},
  year = {2004},
  journal = {Journal of Luminescence},
  volume = {108},
  number = {1-4},
  pages = {173-176},
  month = {Jun},
  isbn = {0022-2313},
  url = {<Go to ISI>://000221572000034 },
  note = {ISI Document Delivery No.: 822WT},
  language = {English},
}