Ultrafast acousto-optic mode conversion in optically birefringent ferroelectrics

Mariusz Lejman, Gwenaelle Vaudel, Ingrid C. Infante, Ievgeniia Chaban, Thomas Pezeril, Mathieu Edely, Guillaume F. Nataf, Mael Guennou, Jens Kreisel, Vitalyi E. Gusev (), Brahim Dkhil and Pascal Ruello ()
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Mariusz Lejman: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine
Gwenaelle Vaudel: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine
Ingrid C. Infante: Laboratoire Structures, Propriétés et Modélisation des Solides, CentraleSupélec, UMR CNRS 8580, Université Paris-Saclay
Ievgeniia Chaban: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine
Thomas Pezeril: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine
Mathieu Edely: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine
Guillaume F. Nataf: Luxembourg Institute of Science and Technology
Mael Guennou: Luxembourg Institute of Science and Technology
Jens Kreisel: Luxembourg Institute of Science and Technology
Vitalyi E. Gusev: Laboratoire d’Acoustique de l’Université du Maine, UMR CNRS 6613, Université du Maine
Brahim Dkhil: Laboratoire Structures, Propriétés et Modélisation des Solides, CentraleSupélec, UMR CNRS 8580, Université Paris-Saclay
Pascal Ruello: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract The ability to generate efficient giga–terahertz coherent acoustic phonons with femtosecond laser makes acousto-optics a promising candidate for ultrafast light processing, which faces electronic device limits intrinsic to complementary metal oxide semiconductor technology. Modern acousto-optic devices, including optical mode conversion process between ordinary and extraordinary light waves (and vice versa), remain limited to the megahertz range. Here, using coherent acoustic waves generated at tens of gigahertz frequency by a femtosecond laser pulse, we reveal the mode conversion process and show its efficiency in ferroelectric materials such as BiFeO3 and LiNbO3. Further to the experimental evidence, we provide a complete theoretical support to this all-optical ultrafast mechanism mediated by acousto-optic interaction. By allowing the manipulation of light polarization with gigahertz coherent acoustic phonons, our results provide a novel route for the development of next-generation photonic-based devices and highlight new capabilities in using ferroelectrics in modern photonics.

Date: 2016
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DOI: 10.1038/ncomms12345

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