Anharmonic interactions of nonequilibrium phonons in LiYF4:Pr3+

We have investigated the decay of nonequilibrium phonons in LiYF 4 :Pr 3+ (1 at. %) at a temperature of 9.5 K. Nonequilibrium phonon populations at 51.9, 66.0, and 113 cm -1 are generated monochromatically with a high-power pulsed far-infrared laser via defect-induced one-phonon absorption, and their temporal and spectral evolution detected using anti-Stokes absorption. We observe the broadband distribution that results from the anharmonic decay of the initial monochromatic phonon population

[1]  Wang,et al.  Temperature effects in nonequilibrium phonon decay. , 1991, Physical review letters.

[2]  Wang,et al.  Decay processes of nonequilibrium phonons in Pr3+-doped yttrium aluminum garnet. , 1991, Physical review. B, Condensed matter.

[3]  Dennis,et al.  Dynamics of monochromatically generated nonequilibrium phonons in LaF3:Pr3+ , 1990, Physical review letters.

[4]  Meltzer,et al.  Inelastic phonon scattering in LaF3 by resonant Raman processes. , 1987, Physical review. B, Condensed matter.

[5]  K. Renk,et al.  Generation of high-frequency phonons by defect-induced one-phonon absorption , 1985 .

[6]  W. Bron,et al.  Quasidiffusive Transport of a Broadband Phonon Distribution , 1984 .

[7]  W. Schaich.  Phonon emission into a diffusive and anharmonic medium , 1984 .

[8]  R. Meltzer,et al.  Anharmonic lifetimes of low-frequency optical phonons in LaF3with the use of monoenergetic generation and detection , 1983 .

[9]  K. Renk,et al.  Spontaneous Decay of High-Frequency Acoustic Phonons in CaF 2 , 1981 .

[10]  W. Bron.  Lifetimes of high-frequency phonons , 1980 .

[11]  G. Saunders,et al.  The elastic constants and acoustic symmetry of LiYF4 , 1979 .

[12]  W. Grill,et al.  Phonon spectroscopy. I. Spectral distribution of a phonon pulse , 1977 .

[13]  P. G. Klemens,et al.  Decay of High‐Frequency Longitudinal Phonons , 1967 .

[14]  R. Orbach,et al.  The attenuation of high frequency phonons at low temperatures , 1964 .

[15]  C. Herring.  Role of Low-Energy Phonons in Thermal Conduction , 1954 .