Creating and moving nanoantenna cold spots anywhere

Alex J. Vernon; Francisco J. Rodríguez-Fortuño

doi:10.1038/s41377-022-00893-7

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Creating and moving nanoantenna cold spots anywhere

Original Articles

- Creating and moving nanoantenna cold spots anywhere
- Light: Science & Applications Vol. 11, Issue 10, Pages: 2335-2344(2022)
- Affiliations：
  
  Department of Physics, King's College London, Strand, London WC2R 2LS, United Kingdom
- Author bio：
  
  Alex J. Vernon (alexander.vernon@kcl.ac.uk)
  Francisco J. Rodríguez-Fortuño (francisco.rodriguez_fortuno@kcl.ac.uk)
- Funds：
- DOI：10.1038/s41377-022-00893-7
  CLC：
- Published：31 October 2022，
  
  Published Online：30 August 2022，
  
  Received：14 September 2021，
  
  Revised：30 May 2022，
  
  Accepted：14 June 2022
- Accepted：
Scan QR Code
Vernon, A. J. & Rodríguez-Fortuño, F. J. Creating and moving nanoantenna cold spots anywhere. Light: Science & Applications, 11, 2335-2344 (2022).
DOI：

Vernon, A. J. & Rodríguez-Fortuño, F. J. Creating and moving nanoantenna cold spots anywhere. Light: Science & Applications, 11, 2335-2344 (2022). DOI： 10.1038/s41377-022-00893-7.

摘要

Abstract

Cold spots are sub-wavelength regions which might emerge near a nanoantenna

should one or more components of some far-field illumination cancel out with scattered light. We show that by changing only the polarisation

amplitude

and phase of two plane waves

a unique

zero-magnitude and highly sub-wavelength cold spot can be created and moved anywhere in the space around a nanoantenna of any arbitrary shape. This can be achieved using ultra-fast modulated pulses

or a time-harmonic approximation. Easily disturbed by a change in the nanoantenna's material or position

a manufactured cold spot is fragile and could be used in nanoscale sensing. Our technique exploits the linearity of Maxwell's equations and could be adapted to manipulate any phenomena governed by the linear wave equation

including acoustic scattering. This is a means for potentially ultra-fast sub-wavelength electric field manipulation.

关键词

Keywords

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