Frequency and temperature dependence of the TO phonon-polariton decay in GaP

A. G. Stepanov, J. Hebling, J. Kuhl

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The temperature and frequency dependence of the decay time of the transverse optical (TO) phonon polariton in GaP has been measured by impulsive stimulated Raman scattering with 25-fs optical pulses. Tuning of the polariton frequency from 365 to 361 cm-1 reveals drastic changes of the polariton decay time with temperature. This result is explainable by third-order anharmonic decay of polaritons into two acoustic phonons taking into account the temperature-dependent shift of the van Hove singularity in the two-phonon density of states of the acoustic phonons at the edge of the Brillouin zone. The frequency dependence of the TO phonon-polariton decay times measured at different temperatures allows one to directly observe the shift of this singularity with temperature.

Original languageEnglish
Article number104304
Pages (from-to)1043041-1043045
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number10
Publication statusPublished - 2001

Fingerprint

polaritons
temperature dependence
decay
Phonons
phonons
Temperature
Acoustics
Stimulated Raman scattering
temperature
acoustics
shift
trucks
Brillouin zones
Laser pulses
Tuning
tuning
Raman spectra
pulses

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Frequency and temperature dependence of the TO phonon-polariton decay in GaP. / Stepanov, A. G.; Hebling, J.; Kuhl, J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 63, No. 10, 104304, 2001, p. 1043041-1043045.

Research output: Contribution to journalArticle

@article{4741bc16a1eb484ba01b09aa40853f44,
title = "Frequency and temperature dependence of the TO phonon-polariton decay in GaP",
abstract = "The temperature and frequency dependence of the decay time of the transverse optical (TO) phonon polariton in GaP has been measured by impulsive stimulated Raman scattering with 25-fs optical pulses. Tuning of the polariton frequency from 365 to 361 cm-1 reveals drastic changes of the polariton decay time with temperature. This result is explainable by third-order anharmonic decay of polaritons into two acoustic phonons taking into account the temperature-dependent shift of the van Hove singularity in the two-phonon density of states of the acoustic phonons at the edge of the Brillouin zone. The frequency dependence of the TO phonon-polariton decay times measured at different temperatures allows one to directly observe the shift of this singularity with temperature.",
author = "Stepanov, {A. G.} and J. Hebling and J. Kuhl",
year = "2001",
language = "English",
volume = "63",
pages = "1043041--1043045",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Physical Society",
number = "10",

}

TY - JOUR

T1 - Frequency and temperature dependence of the TO phonon-polariton decay in GaP

AU - Stepanov, A. G.

AU - Hebling, J.

AU - Kuhl, J.

PY - 2001

Y1 - 2001

N2 - The temperature and frequency dependence of the decay time of the transverse optical (TO) phonon polariton in GaP has been measured by impulsive stimulated Raman scattering with 25-fs optical pulses. Tuning of the polariton frequency from 365 to 361 cm-1 reveals drastic changes of the polariton decay time with temperature. This result is explainable by third-order anharmonic decay of polaritons into two acoustic phonons taking into account the temperature-dependent shift of the van Hove singularity in the two-phonon density of states of the acoustic phonons at the edge of the Brillouin zone. The frequency dependence of the TO phonon-polariton decay times measured at different temperatures allows one to directly observe the shift of this singularity with temperature.

AB - The temperature and frequency dependence of the decay time of the transverse optical (TO) phonon polariton in GaP has been measured by impulsive stimulated Raman scattering with 25-fs optical pulses. Tuning of the polariton frequency from 365 to 361 cm-1 reveals drastic changes of the polariton decay time with temperature. This result is explainable by third-order anharmonic decay of polaritons into two acoustic phonons taking into account the temperature-dependent shift of the van Hove singularity in the two-phonon density of states of the acoustic phonons at the edge of the Brillouin zone. The frequency dependence of the TO phonon-polariton decay times measured at different temperatures allows one to directly observe the shift of this singularity with temperature.

UR - http://www.scopus.com/inward/record.url?scp=0242278199&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0242278199&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0242278199

VL - 63

SP - 1043041

EP - 1043045

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 10

M1 - 104304

ER -