Initial process of the ferroelectric B2 soft mode of KDP studied by the impulsive stimulated Raman scattering with heterodyne detection

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

Research output: Contribution to journalArticle

4 Citations (Scopus)


The ferroelectric B 2 soft mode of KDP has been observed directly in time domain by the impulsive stimulated Raman scattering with a heterodyne detection method (HD-ISRS). HD-ISRS system gives the time dependence of the B 2 mode with an excellent signal to noise ratio near the ferroelectric phase transition temperature. With 80 femtosecond laser pulses, the initial process in the very early stage of the B 2 mode excitation has been discovered for the first time. The initial process is described well by a single exponential function with a time constant independent of temperature.

Original languageEnglish
Pages (from-to)57-62
Number of pages6
Publication statusPublished - Jan 1 2002
Externally publishedYes



  • Heterodyne detection
  • Impulsive stimulated Raman scattering
  • Initial process
  • KDP
  • Phase transition
  • Soft mode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this