{"title":"Light localization near the interface between two crystals with sign-change nonlinearity and the index gradient","authors":"S.E. Savotchenko","doi":"10.1016/j.physleta.2025.130339","DOIUrl":null,"url":null,"abstract":"<div><div>New nonlinear interface waves corresponding to two different cases of a change in the nonlinearity signs are described analytically. The waves propagate along the planar interface between nonlinear and spatially gradient crystals with a hyperbolic profile of the dielectric constant. The combination of the refractive index gradient and nonlinearity allows us to obtain new dispersion properties of the waveguide structure. New exact analytical solutions describing the light nonlinear wave intensity distribution in the transverse direction to the interface is found. The influence of the optical parameters on the patterns of the light localization is described. New effects are found when changing the signs of nonlinearity to the opposite ones. The power flow carried by the interface wave is analytically calculated and analyzed. It is shown that varying the optical parameters allows controlling the distribution of energy flow density between the layers of the crystalline system.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130339"},"PeriodicalIF":2.3000,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics Letters A","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0375960125001197","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
New nonlinear interface waves corresponding to two different cases of a change in the nonlinearity signs are described analytically. The waves propagate along the planar interface between nonlinear and spatially gradient crystals with a hyperbolic profile of the dielectric constant. The combination of the refractive index gradient and nonlinearity allows us to obtain new dispersion properties of the waveguide structure. New exact analytical solutions describing the light nonlinear wave intensity distribution in the transverse direction to the interface is found. The influence of the optical parameters on the patterns of the light localization is described. New effects are found when changing the signs of nonlinearity to the opposite ones. The power flow carried by the interface wave is analytically calculated and analyzed. It is shown that varying the optical parameters allows controlling the distribution of energy flow density between the layers of the crystalline system.
期刊介绍:
Physics Letters A offers an exciting publication outlet for novel and frontier physics. It encourages the submission of new research on: condensed matter physics, theoretical physics, nonlinear science, statistical physics, mathematical and computational physics, general and cross-disciplinary physics (including foundations), atomic, molecular and cluster physics, plasma and fluid physics, optical physics, biological physics and nanoscience. No articles on High Energy and Nuclear Physics are published in Physics Letters A. The journal''s high standard and wide dissemination ensures a broad readership amongst the physics community. Rapid publication times and flexible length restrictions give Physics Letters A the edge over other journals in the field.