Topological phonon transport in an optomechanical system

Hengjiang Ren; Tirth Shah; Tirth Shah; Hannes Pfeifer; Christian Brendel; Vittorio Peano; Florian Marquardt; Oskar Painter; Oskar Painter

doi:10.1364/CLEO_SI.2021.STu2H.3

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2021),
paper STu2H.3
•https://doi.org/10.1364/CLEO_SI.2021.STu2H.3

Topological phonon transport in an optomechanical system

Hengjiang Ren, Tirth Shah, Hannes Pfeifer, Christian Brendel, Vittorio Peano, Florian Marquardt, and Oskar Painter

CLEO: Science and Innovations 2021

San Jose, California United States
9–14 May 2021
ISBN: 978-1-943580-91-0

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Optomechanics (STu2H)

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H. Ren, T. Shah, H. Pfeifer, C. Brendel, V. Peano, F. Marquardt, and O. Painter, "Topological phonon transport in an optomechanical system," in Conference on Lasers and Electro-Optics, J. Kang, S. Tomasulo, I. Ilev, D. Müller, N. Litchinitser, S. Polyakov, V. Podolskiy, J. Nunn, C. Dorrer, T. Fortier, Q. Gan, and C. Saraceno, eds., OSA Technical Digest (Optica Publishing Group, 2021), paper STu2H.3.

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Abstract

We report the observation of topological phonon transport within a multiscale optomechanical crystal structure consisting of an array of over 800 cavity-optomechanical elements. Using sensitive, spatially resolved optical read-out we detect thermal phonons in a 0.325 − 0.34 GHz band traveling along a topological edge channel, with substantial reduction in backscattering. This represents an important step from the pioneering macroscopic mechanical systems work towards topological phononic systems at the nanoscale.

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