Currently, I hold a postdoctoral fellow position at the University of Texas at Austin, in the “Metamaterials & Plasmonics Research Laboratory” of prof. Andrea Alu where I study wave propagation in space-time modulated systems, and asymmetric wave excitation in complex structures.
I earned my Ph.D. at Tel-Aviv University under the supervision of prof. Ben Z. Steinberg, where my research was focused on analytic methods and waves in nano-particle arrays. I received the Rozenberg foundation fellowship (2015), prof. Levzion academic excellence fellowship (2014), several teaching excellence rewards, and student paper distinctions.
I received my B.Sc. from the Technion with honors, in the faculty of Biomedical engineering.
I am interested in electromagnetics and optics, wave theory and physical phenomena in complex and time-varying structures, analytic methods and applied mathematics.
I am married to Shimrit, and a father to 3 amazing children – Ayala, Avigail, and Eitan.
Between Jan. 16th and Jan. 31st i will be visiting several universities in Israel for interviews. Here is the abstrat for my seminar (feel free to contact me for additional details):
Violation of symmetries in wave propagation and excitation
Symmetry and reciprocity are intuitive and basic traits of wave propagation, which we experience daily in many areas. Optical fibers, for example, carry light in the same manner regardless of its propagation direction. Thin material layers and structures (often termed Metasurfaces) can support surface waves, i.e. electromagnetic waves which are tightly bound to the interface. Their flexibility, combined with recent advances in fabrication technologies render them a promising platform for many wave phenomena. Due to fundamental laws of electromagnetism, excitation and propagation of these waves are normally symmetric and reciprocal. Breaking the symmetry of propagation requires a careful design of the media or the exciting source, while violating reciprocity requires either an odd-time bias (such as a magnetic field) or nonlinearities.
In the first part of my talk, I will discuss wave propagation on moving metasurfaces, and show how various guiding regimes arise depending on the stationary surface properties and the metasurface speed. Then, I will explore how modulating the surface properties in both space and time can mimic certain aspects of motion, and how modulation can be used to further tailor and engineer the wave dispersion and excitation.
In some cases, it may be desirable to obtain an asymmetric wave propagation without violating reciprocity to avoid the requirement for magnetic bias, time modulation or nonlinearity. This effect can be achieved in various setups that incorporate some form of chirality or anisotropy. In the second part of my talk I will theoretically discuss this possibility in planar and cylindrical surface waveguides and show how these are related to quantities such as the electromagnetic field spin and helicity.