M.Sc. student Oz Diker won the 3rd prize in the Best Student Paper Award of iWAT2023 (Aalborg, Denmark, May 2023), with his paper “Low-Cost Metagratings for Efficient Anomalous Reflection”. Way to go,Oz!

M. Sc. student Sharon Elad was selected as a finalist in the 2023 EuCAP Student Paper Competition for his paper “Anisotropic Metagratings for Simultaneous Polarization Conversion and Anomalous Reflection”. Way to go, Sharon!

Ph.D. student Amit Shaham was awarded with the IEEE Antennas and Propagation Society Fellowship (APSF) for the year 2022, for his doctoral research theme and achievements. Congratulations, Amit!

Our paper on multimodal anti-reflection coatings, written by Dr. Sherman Marcus in collaboration with Dr. Vinay Killamsetty, Yarden Yashno and Ariel Epstein, has been published in the Physical Review B. The work demonstrates, theoretically and experimentally, that a combination of judiciously designed dielectric slabs can affect dramatically the reflection properties of a given arbitrary grating. In the paper, a rigorous analytical model is utilized to realize perfect anomalous reflection out of various types of such gratings, showcasing the versatility of this simple solution, readily applicable also in a wide range of wave-based physical phenomena.

Ph. D. candidate Amit Shaham received an Honorable Mention at the 2022 IEEE APS/URSI Student Paper Competition for his paper “Systematic Design of Metasurface Angular Filters”.

M. Sc. graduate Liran Biniashvili received a recognition of excellence for his Master’s thesis, entitled “Manipulating Modes in Rectangular Waveguides Using Metagrating-Inspired Techniques.”

Well deserved, Liran!

M. Sc. student Yaakov Shmidman was awarded the 2022 Meyer Scholarship for excellent undergraduate students starting the graduate studies in the Andrew and Erna Faculty of Electrical and Computer Engineering in the Technion.

Way to go, Yaakov!

Our paper on metagrating-inspired solutions for suppressing reflections in waveguide bends, written by Liran Biniashvili and Ariel Epstein, has been published in the IEEE Transactions on Antennas and Propagation. The paper derives a semianlaytical methodology to devise locations for subwavelength scatterers that would eliminate spurious scattering in rectangular waveguide discontinuities by producing secondary fields that destructively interfere with the unwanted reflections in the input port. The analytical model requires modal expansions in the straight waveguide sections (rectangular waveguide modes) as well as in the junction (treated as a radial waveguide section), allowing efficient and accurate retrieval of scattering coefficients without requiring numerical solvers. Including a small scatterer in the junction is performed by incorporating the suitable Green’s function, allowing for calculation of the potential spots as well as the required induced current for mitigation of back reflections while retaining passivity – similar to what has been achieved for metagratings for free space beam manipulation. The examination of these perfect transmission locations reveal fundamental insights regarding the scattering processes within the junction, manifested in the formation of symmetric and antisymmetric solution branches. The work is completed by deriving approximated analytical formulas for the radius of a metallic cylindrical post that can implement the subwavelength scatterer in practice, showing good performance also in terms of bandwidth and sensitivity to fabrication inaccuracies. The work introduces a simple, effective, and semianalytically designed solution for seamless waveguide bends, while demonstrating the versatility of the metagrating concept, beyond beam manipulation.

Liran Biniashvili, a Master’s student, has passed his MSc exam on Feabruary 2nd, 2022.

Way to go, Liran! Congratulations!