Harmonic information transitions of spatiotemporal metasurfaces

Haotian Wu; Xin Xin Gao; Lei Zhang; Guo Dong Bai; Qiang Cheng; Lianlin Li; Tie Jun Cui

doi:10.1038/s41377-020-00441-1

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Harmonic information transitions of spatiotemporal metasurfaces

Original Articles

- Harmonic information transitions of spatiotemporal metasurfaces
- Light: Science & Applications Vol. 9, Issue 6, Pages: 2007-2019(2020)
- Affiliations：
  
  1.State Key Laboratory of Millimetre Waves, Southeast University, 210096 Nanjing, China
  2.Institute of Electromagnetic Space, Southeast University, 210096 Nanjing, China
  3.State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, 100871 Beijing, China
- Author bio：
  
  Tie Jun Cui (tjcui@seu.edu.cn)
- Funds：
- DOI：10.1038/s41377-020-00441-1
  CLC：
- Published：2020，
  
  Published Online：14 December 2020，
  
  Received：20 October 2020，
  
  Revised：13 November 2020，
  
  Accepted：19 November 2020
- Accepted：
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Wu, H. T. et al. Harmonic information transitions of spatiotemporal metasurfaces. Light: Science & Applications, 9, 2007-2019 (2020).
DOI：

Wu, H. T. et al. Harmonic information transitions of spatiotemporal metasurfaces. Light: Science & Applications, 9, 2007-2019 (2020). DOI： 10.1038/s41377-020-00441-1.

摘要

Abstract

Facilitated by ultrafast dynamic modulations

spatiotemporal metasurfaces have been identified as a pivotal platform for manipulating electromagnetic waves and creating exotic physical phenomena

such as dispersion cancellation

Lorentz reciprocity breakage

and Doppler illusions. Motivated by emerging information-oriented technologies

we hereby probe the information transition mechanisms induced by spatiotemporal variations and present a general model to characterize the information processing capabilities of the spatiotemporal metasurface. Group theory and abstract number theory are adopted through this investigation

by which the group extension and independent controls of multiple harmonics are proposed and demonstrated as two major tools for information transitions from the spatiotemporal domain to the spectra-wavevector domain. By incorporating Shannon's entropy theory into the proposed model

we further discover the corresponding information transition efficiencies and the upper bound of the channel capacity of the spatiotemporal metasurface. The results of harmonic information transitions show great potential in achieving high-capacity versatile information processing systems with spatiotemporal metasurfaces.

关键词

Keywords

references

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