סמינר מחלקתי אלקטרוניקה פיזיקאלית: Ana Libster-Hershko

You are invited to attend a lecture
Surface Plasmons on Flat and Curved Surfaces
By:
Ana Libster-Hershko
School of Electrical Engeneering
Ph.D student under supervision of Prof. Ady Arie

Abstract
Surface Plasmon Polaritons (SPPs) are electromagnetic waves that are coupled to collective electron oscillations in the metal and propagate along the interface between a dielectric and a metal layer. These waves enable interesting applications in sensing, on-chip communication and nonlinear optics, owing to their tight confinement to the interface and their relatively small wavelength.
In this talk we explore the propagation dynamics of SPPs in flat and curved surfaces.  In particular, we explore the behavior of self-accelerating SPP beams, such as Weber and Mathieu beams, on plane surfaces. These beams are solutions of the non-paraxial Helmholtz equation in elliptic and parabolic coordinates. Specifically, we show that the plasmonic Weber beam maintains its shape over a much larger distance along the parabolic trajectory, with respect to the corresponding solution of the paraxial equation—the Airy beam.
We also study the propagation of Gaussian plasmonic beams on curved surfaces. Due to the two-dimensional nature of surface plasmons they provide a platform for studying the effect of the curvature on the propagation dynamics.  By forming a bended surface with the shape of a book-cover we can achieve guiding of SPPs on a curved surface, where this guiding mechanism is based on the surface curvature rather than on a contrast of refractive indices.

On Thursday, January 31th 2019, 15:00
Room 011, Kitot building