Large evanescently-induced Brillouin scattering at the surrounding of a nanofibre.

Autor: Yang F; Ecole Polytechnique Fédérale de Lausanne (EPFL), Group for Fibre Optics, CH-1015, Lausanne, Switzerland. fanyang808@gmail.com.; European Molecular Biology Laboratory, Heidelberg, Germany. fanyang808@gmail.com., Gyger F; Ecole Polytechnique Fédérale de Lausanne (EPFL), Group for Fibre Optics, CH-1015, Lausanne, Switzerland.; Max Planck Institute of Quantum Optics, Garching, Germany., Godet A; FEMTO-ST Institute, UMR 6174, Université Bourgogne Franche-Comté, 25030, Besançon, France., Chrétien J; FEMTO-ST Institute, UMR 6174, Université Bourgogne Franche-Comté, 25030, Besançon, France., Zhang L; Ecole Polytechnique Fédérale de Lausanne (EPFL), Group for Fibre Optics, CH-1015, Lausanne, Switzerland., Pang M; State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai, 201800, China., Beugnot JC; FEMTO-ST Institute, UMR 6174, Université Bourgogne Franche-Comté, 25030, Besançon, France. jean-charles.beugnot@femto-st.fr., Thévenaz L; Ecole Polytechnique Fédérale de Lausanne (EPFL), Group for Fibre Optics, CH-1015, Lausanne, Switzerland.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Mar 17; Vol. 13 (1), pp. 1432. Date of Electronic Publication: 2022 Mar 17.
DOI: 10.1038/s41467-022-29051-8
Abstrakt: Brillouin scattering has been widely exploited for advanced photonics functionalities such as microwave photonics, signal processing, sensing, lasing, and more recently in micro- and nano-photonic waveguides. Most of the works have focused on the opto-acoustic interaction driven from the core region of micro- and nano-waveguides. Here we observe, for the first time, an efficient Brillouin scattering generated by an evanescent field nearby a single-pass sub-wavelength waveguide embedded in a pressurised gas cell, with a maximum gain coefficient of 18.90 ± 0.17 m -1 W -1 . This gain is 11 times larger than the highest Brillouin gain obtained in a hollow-core fibre and 79 times larger than in a standard single-mode fibre. The realisation of strong free-space Brillouin scattering from a waveguide benefits from the flexibility of confined light while providing a direct access to the opto-acoustic interaction, as required in free-space optoacoustics such as Brillouin spectroscopy and microscopy. Therefore, our work creates an important bridge between Brillouin scattering in waveguides, Brillouin spectroscopy and microscopy, and opens new avenues in light-sound interactions, optomechanics, sensing, lasing and imaging.
(© 2022. The Author(s).)
Databáze: MEDLINE
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