Modeling scattering matrix containing evanescent modes for wavefront shaping applications in disordered media

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dc.contributor.authorRaju, Michael
dc.contributor.authorJayet, Baptiste
dc.contributor.authorAndersson-Engels, Stefan
dc.contributor.funderTaighde Éireann - Research Ireland
dc.date.accessioned2026-09-09T09:22:01Z
dc.date.available2026-09-09T09:22:01Z
dc.date.issued2026-07-29
dc.description© 2026, the authors. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
dc.description.abstractWe developed an open-source scalar wave transport model to estimate the generalized scattering matrix (S-matrix) of a disordered medium in the diffusion regime. The term generalized refers to the incorporation of evanescent wave field modes alongside propagating modes in the estimation of the S-matrix. To achieve this, we employed the scalar Kirchhoff-Helmholtz boundary integral formulation together with the Green’s function perturbation method, thereby extending the conventional Fisher-Lee relations to include evanescent modes. The estimated S-matrix, which satisfies the generalized unitarity and reciprocity relations, is modeled for a two-dimensional disordered waveguide. The generalized transmission matrix contained within the S-matrix is utilized to estimate the optimal phase-conjugate wavefront for focusing onto an evanescent mode. The phenomenon of a universal transmission value of 2/3 for such an optimal phase conjugate wavefront is demonstrated in the context of evanescent wave mode focusing through a diffusive disorder. The presented code framework may be of interest to wavefront shaping researchers for visualizing and estimating wave transport properties in general.en
dc.description.sponsorshipTaighde Éireann—Research Ireland|SFI/15/RP/2828; Taighde Éireann—Research Ireland|SFI/22/RP-2TF/10293
dc.format.extent16
dc.format.extent3023561
dc.format.extent5944970
dc.identifier.articleid033123
dc.identifier.authororcidRaju, Michael
dc.identifier.authororcidJayet, Baptiste§0000-0003-2459-247X
dc.identifier.authororcidAndersson-Engels, Stefan§0000-0001-5640-3122
dc.identifier.citationRaju, M, Jayet, B & Andersson-Engels, S 2026, 'Modeling scattering matrix containing evanescent modes for wavefront shaping applications in disordered media', Physical Review Research, vol. 8, no. 3, 033123, pp. 1-16. https://doi.org/10.1103/86th-pl8q
dc.identifier.doi10.1103/86th-pl8q
dc.identifier.endpage16
dc.identifier.issn2643-1564
dc.identifier.issued3
dc.identifier.journaltitlePhysical Review Research
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/19199
dc.identifier.urlhttps://www.scopus.com/pages/publications/105046451268
dc.identifier.volume8
dc.language.isoeng
dc.rightscc_by
dc.rightscc_by
dc.subjectDisordered media
dc.subject[TyndallPhotonics]
dc.subject[Physics]
dc.subjectWavefront shaping applications
dc.subjectScattering matrix
dc.subjectEvanescent modes
dc.subjectGeneral Physics and Astronomy
dc.titleModeling scattering matrix containing evanescent modes for wavefront shaping applications in disordered mediaen
dc.typeArticle (Peer reviewed)
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