Experimental control of optical helicity in nanophotonics

Nora Tischler; Ivan Fernandez-Corbaton; Xavier Zambrana-Puyalto; Alexander Minovich; Xavier Vidal; Mathieu L Juan; Gabriel Molina-Terriza

doi:10.1038/lsa.2014.64

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Experimental control of optical helicity in nanophotonics

Original Articles

- Experimental control of optical helicity in nanophotonics
- Light: Science & Applications Vol. 3, Issue 3, (2014)
- Affiliations：
  
  1.ARC Centre for Engineered Quantum Systems, Department of Physics & Astronomy, Macquarie University, Sydney, NSW 2109, Australia
  2.Department of Physics & Astronomy, Macquarie University, Sydney, NSW 2109, Australia
  3.Nonlinear Physics Centre and Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia
- Author bio：
  
  Professor G Molina-Terriza, Department of Physics & Astronomy, Macquarie University, NSW 2109, Australia Email: gabriel.molina-terriza@mq.edu.au
- Funds：
- DOI：10.1038/lsa.2014.64
  CLC：
- Published：2014-09，
  
  Published Online：20 June 2014，
  
  Received：15 November 2013，
  
  Revised：02 April 2014，
  
  Accepted：03 April 2014
- Accepted：
Scan QR Code
Tischler, N. et al. Experimental control of optical helicity in nanophotonics. Light: Science & Applications, 3, e183 (2014).
DOI：

Tischler, N. et al. Experimental control of optical helicity in nanophotonics. Light: Science & Applications, 3, e183 (2014). DOI： 10.1038/lsa.2014.64.

摘要

Abstract

An analysis of light–matter interactions based on symmetries can provide valuable insight

particularly because it reveals which quantities are conserved and which ones can be transformed within a physical system. In this context

helicity can be a useful addition to more commonly considered observables such as angular momentum. The question arises how to treat helicity

the projection of the total angular momentum onto the linear momentum direction

in practical experiments. In this paper

we put forward a simple but versatile experimental treatment of helicity. We then apply the proposed method to the scattering of light by isolated cylindrical nanoapertures in a gold film. This allows us to study the helicity transformation taking place during the interaction of focused light with the nanoapertures. In particular

we observe from the transmitted light that the scaling of the helicity transformed component with the aperture size is very different to the direct helicity component.

关键词

Keywords

helicitynanoaperturenanophotonicsopticssymmetry

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