Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling

Michela F. Picardi; Martin Neugebauer; Jörg S. Eismann; Gerd Leuchs; Peter Banzer; Francisco J. Rodríguez-Fortuño; Anatoly V. Zayats

doi:10.1038/s41377-019-0162-x

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Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling

Letter

- Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling
- Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling
- LSA 2019年8卷第4期页码：464-470
- Affiliations：
  
  1.Department of Physics and London Centre for Nanotechnology, King's College London, Strand, London WC2R 2LS, UK
  2.Max Planck Institute for the Science of Light, Staudtstr. 2, D-91058 Erlangen, Germany
  3.Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Staudtstr. 7/B2, D- 91058 Erlangen, Germany
- Author bio：
  
  Peter Banzer (peter.banzer@mpl.mpg.de)
  Francisco J. Rodríguez-Fortuño (francisco.rodriguez_fortuno@kcl.ac.uk)
- Funds：
- DOI：10.1038/s41377-019-0162-x
  中图分类号：
- 纸质出版日期：2019，
  
  网络出版日期：2019-06-05，
  
  收稿日期：2018-11-19，
  
  修回日期：2019-04-01，
  
  录用日期：2019-04-16
- Accepted：
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Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling[J]. LSA, 2019,8(4):464-470.

Picardi, M. F. et al. Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling. Light: Science & Applications, 8, 464-470 (2019).
Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling[J]. LSA, 2019,8(4):464-470. DOI： 10.1038/s41377-019-0162-x.

Picardi, M. F. et al. Experimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling. Light: Science & Applications, 8, 464-470 (2019). DOI： 10.1038/s41377-019-0162-x.

摘要

Abstract

The electromagnetic field scattered by nano-objects contains a broad range of wavevectors and can be efficiently coupled to waveguided modes. The dominant contribution to scattering from subwavelength dielectric and plasmonic nanoparticles is determined by electric and magnetic dipolar responses. Here

we experimentally demonstrate spectral and phase selective excitation of Janus dipoles

sources with electric and magnetic dipoles oscillating out of phase

in order to control near-field interference and directional coupling to waveguides. We show that by controlling the polarisation state of the dipolar excitations and the excitation wavelength to adjust their relative contributions

directionality and coupling strength can be fully tuned. Furthermore

we introduce a novel spinning Janus dipole featuring cylindrical symmetry in the near and far field

which results in either omnidirectional coupling or noncoupling. Controlling the propagation of guided light waves via fast and robust near-field interference between polarisation components of a source is required in many applications in nanophotonics and quantum optics.

关键词

Keywords

references

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