Transverse spin in the scattering of focused radially and azimuthally polarized vector beams

Ankit Kumar Singh, Sudipta Saha, Subhasish Dutta Gupta, and Nirmalya Ghosh
Phys. Rev. A 97, 043823 – Published 12 April 2018

Abstract

We study the effect of focusing of the radially and azimuthally polarized vector beams on the spin angular momentum (SAM) density and Poynting vector of scattered waves from a Mie particle. Remarkably, the study reveals that the SAM density of the scattered field is solely transverse in nature for radially and azimuthally polarized incident vector beams; however, the Poynting vector shows the usual longitudinal character. We also demonstrate that the transverse SAM density can further be tuned with wavelength and focusing of the incident beam by exploiting the interference of different scattering modes. These results may stimulate further experimental techniques to detect the transverse spin and Belinfante's spin-momentum densities.

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  • Received 17 January 2018

DOI:https://doi.org/10.1103/PhysRevA.97.043823

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Ankit Kumar Singh1, Sudipta Saha1,*, Subhasish Dutta Gupta2, and Nirmalya Ghosh1

  • 1Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
  • 2School of Physics, University of Hyderabad, Hyderabad 500046, India

  • *sudipta.20a@gmail.com

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Issue

Vol. 97, Iss. 4 — April 2018

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