Analysis of nonlinear response of anti-parity-time symmetric structure

• Autorzy: Mossakowska-Wyszyńska Agnieszka , Witoński Piotr , Szczepański Paweł

Identyfikatory

DOI

10.24425/opelre.2025.154198

• Języki publikacji: EN

Abstrakty

EN

This paper presents a theoretical analysis of a gain and loss saturation effect in planar multilayer anti-parity-time (APT) symmetric structures for the first time. This analysis makes it possible to examine the behaviour of nonlinear APT structures when excited by incident light of known intensity and compare their properties with corresponding paritytime (PT) symmetric structures. Two types of APT structures are studied: one with both layers of the primitive cell being gain layers and the other with both layers being loss layers. The refractive indices of the individual layers satisfy the condition n(z) =-n*(-z). Nonlinear analysis is performed using a modified transfer matrix method, which allows for the determination of output intensity characteristics as a function of input intensity for different levels of gain or loss saturation intensities. These characteristics demonstrate a bistable behaviour and a strong nonreciprocal response of the investigated APT structures. The results obtained for both types of APT structures are compared with corresponding PT structures, showing that APT structures reveal identical linear and nonlinear responses as corresponding PT structures.

Słowa kluczowe

EN

anti-parity-time symmetry; transfer matrix method; periodic lattice; nonlinear effects; negative index material

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2025
• Tom: Vol. 33, No. 2
• Strony: art. no. e154198
• Opis fizyczny: Bibliogr. 26 poz., rys., tab., wykr.

Twórcy

autor

Mossakowska-Wyszyńska Agnieszka

• Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, ul. Koszykowa 75, 00-665 Warsaw, Poland

• https://orcid.org/0000-0001-7822-5558

autor

Witoński Piotr

• Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, ul. Koszykowa 75, 00-665 Warsaw, Poland

• https://orcid.org/0000-0002-5065-1018

autor

Szczepański Paweł

• Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, ul. Koszykowa 75, 00-665 Warsaw, Poland
• National Institute of Telecommunications, ul. Szachowa 1, 04-894 Warsaw, Poland

• https://orcid.org/0000-0002-2509-8724

Bibliografia

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Uwagi

1. The authors wish to thank Ms. Urszula Wyszyńska for checking the linguistic correctness of the manuscript.

2. Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).