Abstract
Simulations of coherent phonon-polaritons in ferroelectric crystals have been performed to guide impulsive stimulated Raman scattering (ISRS) characterization of lattice anharmonicity. ISRS excitation of the polar ferroelectric mode and propagation of phonon-polaritons in two spatial dimensions within the crystal are examined. The correct relation between the light scattering and phonon-polariton wavevectors is derived. Using model anharmonic potentials, we find that harmonics of the polariton wavevector, rather than harmonics of the polariton frequency, are key signatures of lattice anharmonicity. This suggests an experimental refinement, which we call time-resolved wavevector overtone spectroscopy, for observation of lattice anharmonicity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
