Imaging of microwave-induced acoustic fields in LiNbO 3 by high-performance Brillouin microscopy

B Vincent (1, 2) , J Krüger (3, 1) , O Elmazria (1, 2) , L Bouvot (1, 2) , Julia Mainka (4, 1, 3) , R Sanctuary (5, 1) , Didier Rouxel (1, 2) , P Alnot (1, 2)

1 Laboratoire Européen de Recherche Universitaire, Saarland-Lorraine, Germany
2 LPMIA - Laboratoire de physique des milieux ionisés et applications
3 Universität des Saarlandes [Saarbrücken]
4 LEMTA - Laboratoire d'Energétique et Mécanique Théorique et Appliquée
5 University of Luxembourg [Luxembourg]

High performance Brillouin microscopy (BM) has been used to characterize the spatial distribution of piezoelectrically induced acoustic fields excited at microwave frequencies in a LiNbO3 single crystal. It is demonstrated that under suitable conditions BM is able to detect microwave-induced bulk as well as surface acoustic waves. Brillouin spectroscopy is able to probe sound wave intensities of induced phonons, which are as small as those of thermal phonons.

Domaines: Energie électrique

B Vincent, J Krüger, O Elmazria, L Bouvot, Julia Mainka, et al.. Imaging of microwave-induced acoustic fields in LiNbO 3 by high-performance Brillouin microscopy. Journal of Physics D: Applied Physics, 2005, 38 (12), pp.2026 - 2030. ⟨10.1088/0022-3727/38/12/026⟩. ⟨hal-01568029⟩