Structured transverse orbital angular momentum probed by a levitated optomechanical sensor.

Autor: Hu Y; Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom.; London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom., Kingsley-Smith JJ; Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom.; London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom., Nikkhou M; Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom.; London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom., Sabin JA; Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom.; London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom., Rodríguez-Fortuño FJ; Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom.; London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom., Xu X; State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China. xuxhao_dakuren@163.com., Millen J; Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom. james.millen@kcl.ac.uk.; London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom. james.millen@kcl.ac.uk.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 May 06; Vol. 14 (1), pp. 2638. Date of Electronic Publication: 2023 May 06.
DOI: 10.1038/s41467-023-38261-7
Abstrakt: The momentum carried by structured light fields exhibits a rich array of surprising features. In this work, we generate transverse orbital angular momentum (TOAM) in the interference field of two parallel and counter-propagating linearly-polarised focused beams, synthesising an array of identical handedness vortices carrying intrinsic TOAM. We explore this structured light field using an optomechanical sensor, consisting of an optically levitated silicon nanorod, whose rotation is a probe of the optical angular momentum, which generates an exceptionally large torque. This simple creation and direct observation of TOAM will have applications in studies of fundamental physics, the optical manipulation of matter and quantum optomechanics.
(© 2023. The Author(s).)
Databáze: MEDLINE
Externí odkaz: