Temporal aiming

Victor Pacheco-Peña; Nader Engheta

doi:10.1038/s41377-020-00360-1

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Temporal aiming

Original Articles

- Temporal aiming
- Light: Science & Applications Vol. 9, Issue 6, Pages: 1788-1799(2020)
- Affiliations：
  
  1.School of Mathematics, Statistics and Physics, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
  2.Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
- Author bio：
  
  Victor Pacheco-Peña (victor.pacheco-pena@newcastle.ac.uk)
  Nader Engheta (engheta@ee.upenn.edu)
- Funds：
- DOI：10.1038/s41377-020-00360-1
  CLC：
- Published：2020，
  
  Published Online：20 July 2020，
  
  Received：02 February 2020，
  
  Revised：29 May 2020，
  
  Accepted：19 June 2020
- Accepted：
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Pacheco-Peña, V. & Engheta, N. Temporal aiming. Light: Science & Applications, 9, 1788-1799 (2020).
DOI：

Pacheco-Peña, V. & Engheta, N. Temporal aiming. Light: Science & Applications, 9, 1788-1799 (2020). DOI： 10.1038/s41377-020-00360-1.

摘要

Abstract

Deflecting and changing the direction of propagation of electromagnetic waves are needed in multiple applications

such as in lens–antenna systems

point-to-point communications and radars. In this realm

metamaterials have been demonstrated to be great candidates for controlling wave propagation and wave–matter interactions by offering manipulation of their electromagnetic properties at will. They have been studied mainly in the frequency domain

but their temporal manipulation has become a topic of great interest during the past few years in the design of spatiotemporally modulated artificial media. In this work

we propose an idea for changing the direction of the energy propagation of electromagnetic waves by using time-dependent metamaterials

the permittivity of which is rapidly changed from isotropic to anisotropic values

an approach that we call

temporal aiming

. In so doing

here

we show how the direction of the Poynting vector becomes different from that of the wavenumber. Several scenarios are analytically and numerically evaluated

such as plane waves under oblique incidence and Gaussian beams

demonstrating how proper engineering of the isotropic—anisotropic temporal function of ε

(t) can lead to a redirection of waves to different spatial locations in real time.

关键词

Keywords

references

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Temporal aiming

DOI：10.1038/s41377-020-00360-1

摘要

Abstract

关键词

Keywords

references