Bittner, B. and Scherm, M. and Schoedl, T. and Tyroller, T. and Schwarz, Ulrich T. and Maier, Max (2002) Phonon-polariton damping by low-frequency excitations in lithium tantalate investigated by spontaneous and stimulated Raman scattering. JOURNAL OF PHYSICS-CONDENSED MATTER, 14 (39). pp. 9013-9028. ISSN 0953-8984
Full text not available from this repository.Abstract
We investigated the damping of phonon polaritons in congruent lithium tantalate (LiTaO3) single crystals by measuring spontaneous Raman spectra of the low-frequency wing of the A(1) phonon line, the dependence of the linewidth of the stimulated Raman scattering gain curves on polariton frequency and the spatial damping of propagating phonon-polariton pulses by nonlocal time-delayed coherent anti-Stokes Raman scattering. The damping and the dispersion curve of the lowest-frequency A, phonon polaritons were determined from 10 to 200 cm(-1) at room temperature and at 77 K. The observed frequency dependence of the damping is discussed in the context of low-frequency excitations and a Debye relaxational mode.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHASE-TRANSITION; LITAO3; DEPENDENCE; CRYSTALS; NIOBATE; LINBO3; MODES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Ulrich Schwarz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Aug 2021 05:57 |
| Last Modified: | 27 Aug 2021 05:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39779 |
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