Picosecond impulsive stimulated brillouin scattering: Optical excitation of coherent transverse acoustic waves and application to time-domain investigations of structural phase transitions
✍ Scribed by Margaret M. Robinson; Yong-Xin Yan; Edward B. Gamble Jr.; Leah Ruby Williams; Jeffrey S. Meth; Keith A. Nelson
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 570 KB
- Volume
- 112
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A prxticd stimulated Brillouin-scattering method for spectroscopic characterization of lo\'-frequency cxitations is extcndcd to permit optical gcnerntion and detection of pbasc-cobercnt trmsverse. longitudinal. snd mixed polarization acoustic pbonons. tunable over a wide frequency rang, in solid media_ Results arc prcsentcd for BK-7 g1.m snd the KH~P04 tryst-al near its structural phase transition (SPT). Time-domain observations of acoustic phonon-induced ordering nca SPTs in KH2P04 and.KD2P04 were carried out, -and applications of the technique lo measurements of SPT dynamics are discussed.