Generation of coherent thermal phonons in amorphous dielectrics at room temperature induced by four-photon interaction

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776110110051· OSTI ID:21471711

Pershin, S M ^[1]

---

1. Russian Academy of Sciences, Research Center of Wave Studies, Prokhorov General Physics Institute (Russian Federation)

Resonant responses of Mandelshtam-Brillouin scattering from longitudinal and transverse acoustic waves at frequencies of {nu}{sub LS} = {+-}1.15 cm{sup -1} and {nu}{sub TS} = {+-}0.7 cm{sup -1}, respectively, and at frequency of {nu}{sub SS} = {nu}{sub TS{radical}}3 = {+-}0.43 cm{sup -1} were detected in K8 optical glass at room temperature using four-photon spectroscopy. We attribute this effect to the induced generation of a second sound wave (coherent thermal phonons). The mechanisms of generation and the possibility of practical application of the observed effect for express diagnostics of the quality of transparent materials are discussed.

• OSTI ID: 21471711
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 111, Issue 5; Other Information: DOI: 10.1134/S1063776110110051; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
AMORPHOUS STATE
BRILLOUIN EFFECT
COHERENT RADIATION
DIELECTRIC MATERIALS
GLASS
MULTI-PHOTON PROCESSES
PHONONS
PHOTONS
SECOND SOUND
SOUND WAVES
SPECTROSCOPY
BOSONS
COHERENT SCATTERING
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
MASSLESS PARTICLES
MATERIALS
QUASI PARTICLES
RADIATIONS
SCATTERING