Startseite Electromagnetic propagation characteristics of one-dimensional photonic crystals with metal layers in quasi-parity-time (PT)-symmetric system
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Electromagnetic propagation characteristics of one-dimensional photonic crystals with metal layers in quasi-parity-time (PT)-symmetric system

  • Guanxia Yu EMAIL logo , Yihang Lv , Xiaomeng Zhang und Ruoyu Cao
Veröffentlicht/Copyright: 3. Juli 2020
Zeitschrift für Naturforschung A
Aus der Zeitschrift Zeitschrift für Naturforschung A Band 75 Heft 7

Abstract

In this study, the propagation characteristics of electromagnetic waves in a parity-time (PT)-symmetrical 1D photonic crystal comprising dispersed silver layers are investigated. Based on the transmission matrix theory, the total reflection and transmission coefficients of the structure are obtained. It was found that, due to the PT-symmetrical structure, the reflections of the left and right incident waves are nonreciprocal. Numerical simulations indicated that the width of the band gap decreases with the increase in the gain and loss factor ρ in the PT medium, and the band gap ultimately disappears when ρ reaches a critical value, i. e., ρ P T . With the increase in ρ > ρ P T , anomalous transmittance and reflection occur within the original bang gap. As the gain and loss factor ρ continue to increase, the abnormal transmittance and reflectivity exhibit a trend of oscillatory decline, and perfect transmission can be achieved at larger values of ρ.

Keywords: PT material; nonreciprocal transmission; dispersive metal
Corresponding author: Guanxia Yu, College of Science, Nanjing Forestry University, Nanjing 210037, PR China; College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, PR China. E-mail:

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-04-12
Revised: 2020-05-15
Accepted: 2020-05-18
Published Online: 2020-07-03
Published in Print: 2020-07-28

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/zna-2020-0104
Schlagwörter für diesen Artikel
PT material; nonreciprocal transmission; dispersive metal

Artikel in diesem Heft

  1. Frontmatter
  2. General
  3. Remote magnetically controlled drug release from electrospun composite nanofibers: design of a smart platform for therapy of psoriasis
  4. Dynamical Systems & Nonlinear Phenomena
  5. A modified simple chaotic hyperjerk circuit: coexisting bubbles of bifurcation and mixed-mode bursting oscillations
  6. Dynamics of a discrete-time system with Z-type control
  7. Dynamic response of axially loaded end-bearing rectangular closed diaphragm walls
  8. Hydrodynamics
  9. Admissibility conditions for Riemann data in shallow water theory
  10. Numerical study on the rotating electro-osmotic flow of third grade fluid with slip boundary condition
  11. Solid State Physics & Materials Science
  12. Ultrasonic study of Si-oil based magneto-rheological fluid
  13. Electromagnetic propagation characteristics of one-dimensional photonic crystals with metal layers in quasi-parity-time (PT)-symmetric system
  14. Thermodynamics & Statistical Physics
  15. Combined influence of axial electron temperature and exponential plasma density ramp on the self-focusing of a chirped laser in plasma
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