Abstract
We have investigated the decay of nonequilibrium phonons in ${\mathrm{LiYF}}_{4}$:${\mathrm{Pr}}^{3+}$ (1 at. %) at a temperature of 9.5 K. Nonequilibrium phonon populations at 51.9, 66.0, and 113 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ 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. The experimental data are modeled using a Monte Carlo simulation based on spontaneous three phonon processes. The simulation is in good agreement with the experimental data.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.