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: Contribution to journalArticlepeer-review

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
Pages (from-to)3-13
Number of pages11
JournalFerroelectrics
Volume284
DOIs
Publication statusPublished - Jun 1 2003
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Phase transition dynamics studied by coherent phonon excitation with ultrashort laser pulses'. Together they form a unique fingerprint.

Cite this