Interplay between diffraction and the Pancharatnam-Berry phase in inhomogeneously twisted anisotropic media

Chandroth P. Jisha, Alessandro Alberucci, Lorenzo Marrucci, Gaetano Assanto

    Research output: Contribution to journalArticleScientificpeer-review

    9 Citations (Scopus)

    Abstract

    We discuss the propagation of an electromagnetic field in an inhomogeneously anisotropic material where the optic axis is rotated in the transverse plane but is invariant along the propagation direction. In such a configuration, the evolution of an electromagnetic wave packet is governed by the Pancharatnam-Berry phase (PBP), which is responsible for the appearance of an effective photonic potential. In a recent paper [ACS Photon. 3, 2249 (2016)] we demonstrated that the effective potential supports transverse confinement. Here we find the profile of the quasimodes and show that the photonic potential arises from the Kapitza effect of light. The theoretical results are confirmed by numerical simulations, accounting for the medium birefringence. Finally, we analyze in detail a configuration able to support nonleaky guided modes.
    Original languageEnglish
    Article number023823
    Number of pages12
    JournalPhysical Review A
    Volume95
    Issue number2
    DOIs
    Publication statusPublished - 2017
    Publication typeA1 Journal article-refereed

    Publication forum classification

    • Publication forum level 2

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