Simulation of Phonon-Polariton Generation and Propagation in Ferroelectric LiNbO3 Crystals

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We simulate propagation of phonon-polaritons (admixtures of polar lattice vibrations and electromagnetic waves) in ferroelectric LiNbO3 with a model that consists of a spatially periodic array of harmonic oscillators coupled to THz electromagnetic waves through an electric dipole moment. We show that when this model is combined with the auxiliary differential equation method of finite difference time domain (FDTD) simulations, the salient features of phonon-polaritons may be illustrated. Further, we introduce second order nonlinear coupling to an optical field to demonstrate phonon-polariton generation by impulsive stimulated Raman scattering (ISRS). The phonon-polariton dispersion relation in bulk ferroelectric LiNbO3 is determined from simulation.
6 pages, 4 figures, presented at the Materials Research Society fall meeting, Boston, MA, 2003

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/23074

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0401091
 http://arxiv.org/abs/cond-mat/0401091
 in Engineered Porosity for Microphotonics and Plasmonics: MRS Symposium Proceedings, Vol. 762, edited by R. Wehrspohn et al (Materials Research Society, Pittsburgh, PA, 2003), pp.C11.60.1-6

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