Phase transition dynamics studied by coherent phonon excitation with ultrashort laser pulses

Toshirou Yagi, Jun Kano, Tateo Watanuki, Yuhji Tsujimi, Keith A. Nelson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The low-frequency light scattering spectroscopy always encounters experimentally a difficulty near the phase transition point due to the overlapping between the soft mode spectra and the strong elastic-scattering component originated from the surface and/or imperfections irradiated by the laser light. A time-resolved phonon spectroscopy, the coherent phonon excitation method , has been introduced as a new method to compliment the light scattering method. It observe directly the time dependence of the soft phonons excited artificially in terms of pico- or femtosecond laser pulses. Several cases of the studies on TGS, TGSe, KDP, DKDP and LiNbO 3 are briefly mentioned.

Original languageEnglish
Title of host publicationFerroelectrics
Pages3-13
Number of pages11
Volume284
DOIs
Publication statusPublished - Jun 1 2003
Externally publishedYes

Fingerprint

Ultrashort pulses
Light scattering
light scattering
Phase transitions
Spectroscopy
Elastic scattering
Phonons
transition points
pulses
encounters
spectroscopy
excitation
time dependence
lasers
elastic scattering
phonons
low frequencies
Defects
Lasers
defects

Keywords

  • ISRS
  • Phase transition
  • Phonon excitation
  • Slow dynamics
  • Soft mode

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Yagi, T., Kano, J., Watanuki, T., Tsujimi, Y., & Nelson, K. A. (2003). Phase transition dynamics studied by coherent phonon excitation with ultrashort laser pulses. In Ferroelectrics (Vol. 284, pp. 3-13) https://doi.org/10.1080/00150190390204240

Phase transition dynamics studied by coherent phonon excitation with ultrashort laser pulses. / Yagi, Toshirou; Kano, Jun; Watanuki, Tateo; Tsujimi, Yuhji; Nelson, Keith A.

Ferroelectrics. Vol. 284 2003. p. 3-13.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yagi, Toshirou ; Kano, Jun ; Watanuki, Tateo ; Tsujimi, Yuhji ; Nelson, Keith A. / Phase transition dynamics studied by coherent phonon excitation with ultrashort laser pulses. Ferroelectrics. Vol. 284 2003. pp. 3-13
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