Our paper “Dual-polarized all-metallic metagratings for perfect anomalous reflection” by PhD student Oshri Rabinovich and A. Epstein,  has been published in the Physical Review Applied. The paper utilizes an analytical formalism to control scattering from a periodic arrangements of grooves made in a metallic slab, showing (both theoretically and experimentally) that anomalous reflection can be efficiently achieved with this all-metallic structure. In addition to the simple two-channel anomalous reflection, the model is able to tackle scenarios with multiple diffraction orders by utilizing multiple (different) grooves per period. Dual-polarized operation is also feasible with this configuration, as demonstrated as well, and fundamental limitations related to manipulating transverse electric fields are revealed and discussed. The results enable harnessing the metagrating appealing semianalytical design schemes for applications where all-metallic structures are preferred, such as high-frequency systems and spaceborne apparatus.

PhD student Amit Shaham has passed his candidacy exam. Congratulations!

Yarden Yashno has joined our group as a Master’s student 🙂

Welcome, Yarden!

Oz Diker has joined our group as a Master’s student 🙂

Welcome, Oz!

Our paper “Electrically thick Fabry-Perot omega bianisotropic metasurfaces as virtual antireflective coatings and nonlocal field transformers” by Dr. Sherman W. Marcus (Research Associate) and A. Epstein,  has been published in the Physical Review B. The paper shows how our previously introduced Fabry-Perot Huygens’ metasurface construct can be extended to realize omega-bianisotropic metasurfaces. Breaking the symmetry of the unit cells enables an accurate emulation of arbitrary inhomogeneous omega-bianosotropic profiles, while retaining the appealing anayltical model allowing effortless synthesis of the physical unit cell configuration. In addition to demonstrating (via simulations) that nonlocal field transformations previously proposed with abstract omega-bianisotropic metasurfaces can indeed be realized using the proposed configuration, we were able to harness a rigorous Floquet-Bloch analysis to show that under certain conditions, the bianisotropic metasurfaces can be viewed as a Huygens’ metasurface with the addition of a virtual anti-reflective coating. For refractive metasurfaces, this intriguing physical interpretation provides insight into the mechanism by which omega-bianisotropic metasurfaces realize perfect anomalous refraction, eliminating spurious coupling to specular reflection observed for Huygens’ metasurfaces.

In the Editorial Board meeting conducted during the (virtual) IEEE APS/URSI symposium (July 2020) it was announced that Ariel Epstein was selected as an Outstanding Associate Editor for the IEEE Transactions on Antennas and Propagation for this year. Ariel has been acting as AE for the journal since 2018.

Amit Shaham, a Master’s student in the group, has been accepted to the direct track to Ph. D., and will continue in our group as a Ph. D. candidate.

 

Good luck, Amit!

M. Sc. student Amit Shaham was selected as a finalist in the 2020 IEEE APS/URSI Student Paper Competition for his paper “Plane-Wave Scattering off Sinusoidally-Modulated Metasurfaces with Normal Susceptibilities”.

Way to go, Amit!

This is the second time in a row that a student from our group appears in the finals (top 10) for this symposoium, with M. Sc. student Liran Biniashvili participating in the 2019 IEEE APS/URSI finals in Atlanta, GA.

Dr. Ariel Epstein is among the 147 Outstanding Referees of the Physical Review journals (a lifetime award), as chosen out of ~71,000 active referees by the journal editors for 2020.

 

Ph. D. candidate Oshri Rabinovich was chosen to receive the Jacobs Excellence Award for doctoral students for the year 2020. Congratulations!