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Optical Pulling and Pushing Forces in Bilayer PT-Symmetric Structures

Rasoul Alaee1,*, Johan Christensen2, and Muamer Kadic3

  • 1Max Planck Institute for the Science of Light, Erlangen 91058, Germany
  • 2Instituto Gregorio Millan Barbany, Universidad Carlos III de Madrid, ES-28916 Leganés, Madrid, Spain
  • 3Institut FEMTO-ST, UMR 6174, CNRS, Université de Bourgogne Franche-Comté, 25000 Besançon, France

  • *Corresponding author. rasoul.alaee@mpl.mpg.de
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Phys. Rev. Applied 9, 014007 – Published 9 January, 2018

DOI: https://doi.org/10.1103/PhysRevApplied.9.014007

Abstract

We investigate the optical force exerted on a parity-time-symmetric bilayer made of balanced gain and loss. We show that an asymmetric optical pulling or pushing force can be exerted on this system depending on the direction of impinging light. The optical pulling or pushing force has a direct physical link to the optical characteristics embedded in the non-Hermitian bilayer. Furthermore, we suggest taking advantage of the optically generated asymmetric force to launch vibrations of an arbitrary shape, which is useful for the contactless probing of mechanical deformations.

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Phys. Rev. Applied 9, 014007– Published 9 January, 2018
  • Received 25 July 2017
  • Revised 16 October 2017
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