Low frequency E-symmetry phonon modes in LiTaO3: a non-linear temporal domain approach

Autor:	J Etchepare, M Mérian, C A Gautier
Rok vydání:	2000
Předmět:	Condensed matter physics Chemistry Phonon Physics::Optics Condensed Matter Physics Symmetry (physics) Nonlinear system Four-wave mixing Dispersion relation Dispersion (optics) Polariton General Materials Science Domain analysis Statistical physics
Zdroj:	Journal of Physics: Condensed Matter. 12:7175-7182
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/12/32/302
Popis:	We present a non-linear temporal domain analysis that allows us to choose among previously published attributions of LO and TO E-symmetry phonon modes in the LiTaO3 crystal. The work is based on the fact that an appropriate study of the phonon-polariton regime enables us to reach a better accuracy in the knowledge of the one-phonon dynamics characteristics. The use of a temporal domain four wave mixing technique with ultra-short light pulses is a powerful tool in this respect. Precise examination of the phonon-polariton dispersion gives the e⊥ component of the dielectric tensor. Polariton damping leads moreover to appreciation of the strength of the various temporal responses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d88d9ad46b98389cd5cbb8746d4deea4 https://doi.org/10.1088/0953-8984/12/32/302 Zobrazit plný text záznamu