Observation of photon droplets and their dynamics

Wilson, K. E., Westerberg, N. , Valiente, M., Duncan, C. W., Wright, E. M., Öhberg, P. and Faccio, D. (2018) Observation of photon droplets and their dynamics. Physical Review Letters, 121(13), 133903. (doi: 10.1103/PhysRevLett.121.133903)

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We present experimental evidence of photon droplets in an attractive (focusing) nonlocal nonlinear medium. Photon droplets are self-bound, finite-sized states of light that are robust to size and shape perturbations due to a balance of competing attractive and repulsive forces. It has recently been shown theoretically, via a multipole expansion of the nonlocal nonlinearity, that the self-bound state arises due to competition between the s -wave and d -wave nonlinear terms, together with diffraction. The theoretical photon droplet framework encompasses both a solitonlike stationary ground state and the nonsolitonlike dynamics that ensue when the system is displaced from equilibrium, i.e., driven into an excited state. We present numerics and experiments supporting the existence of these photon droplet states and measurements of the dynamical evolution of the photon droplet orbital angular momentum.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Faccio, Professor Daniele and Westerberg, Dr Niclas
Authors: Wilson, K. E., Westerberg, N., Valiente, M., Duncan, C. W., Wright, E. M., Öhberg, P., and Faccio, D.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114
Published Online:27 September 2018
Copyright Holders:Copyright © 2018 American Physical Society
First Published:First published in Physical Review Letters 121(13): 133903
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
303021Black Hole Superradiance in Rotating Fluids (SURF)Daniele FaccioEngineering and Physical Sciences Research Council (EPSRC)EP/P006078/2P&S - Physics & Astronomy