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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 541-544 |
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Mohammadpour A, Barvestani J, Soltani Vala A. Investigation of the Effect of Defect Thickness on Anomalous Properties of a Parity-Time Reversal Symmetry System. ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :541-544
URL: http://opsi.ir/article-1-2557-en.html
URL: http://opsi.ir/article-1-2557-en.html
1-
2- University of Tabriz
2- University of Tabriz
Abstract: (695 Views)
Understanding the concepts related to parity-time symmetry (PT) is possible in artificial optical environments including gain and loss regions. In this paper, the effect of defect thickness in a multilayer system with PT symmetry is investigated. The proposed system consists of two one-dimensional PT photonic crystals with respect to the origin, which by changing the thickness of the central layers as a defect, the behavior of the system has been studied. Using the transfer matrix method (TMM) and investigating the reflection and transmission spectra and measuring the π-phase hopping in the reflection spectrum for different frequency regions and observing the unimodular eigenvalues of the scattering matrix at exceptional points (EPs), significant features such as unidirectional reflectionless will be available. As the thickness of defect layers increases, the EPs disappear and the reflection phase hopping exceeds the previous value.
Keywords: Parity-time symmetry, Reflectionless, Metamaterials, Scattering matrix, Exceptional points.
Type of Study: Experimental |
Subject:
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