250 citations · 378 across the 7 of their papers we have counts for
7 papers
Demonstration of a Polarization-Agnostic Geometric Phase in Nonlocal Metasurfaces
Adam Overvig, Yoshiaki Kasahara, Gengyu Xu +1
Symmetry-driven phenomena arising in nonlocal metasurfaces supporting quasi-bound states in the continuum (q-BICs) have been opening new avenues to tailor enhanced light-matter int…
Broadband Coherent Wave Control Through Photonic Collisions at Time Interfaces
Emanuele Galiffi, Gengyu Xu, Shixiong Yin +3
Coherent wave control exploits the interference among multiple waves impinging on a system to suppress or enhance outgoing signals based on their relative phase and amplitude. This…
Observation of Temporal Reflections and Broadband Frequency Translations at Photonic Time-Interfaces
Hady Moussa, Gengyu Xu, Shixiong Yin +3
Time-reflection is a uniform inversion of the temporal evolution of a signal, which arises when an abrupt change in the properties of the host material occurs uniformly in space. A…
Extreme Beam-forming with Impedance Metasurfaces Featuring Embedded Sources and Auxiliary Surface Wave Optimization
Gengyu Xu, Vasileios G. Ataloglou, Sean V. Hum +1
We present the end-to-end design of compact passive and lossless metasurface (MTS) antennas with integrated feeds. The complete low-profile system consists of a single-layered reac…
Extreme Beam-forming with Metagrating-assisted Planar Antennas
Gengyu Xu, Sean V. Hum, George V. Eleftheriades
We present a highly efficient metagrating-assisted antenna (MGA) architecture with a simple integrated feed. Power from a localized line source is distributed throughout the arbitr…
Approach to the Analysis and Synthesis of Cylindrical Metasurfaces with Non-circular Cross Sections Based on Conformal Transformations
Gengyu Xu, George V. Eleftheriades, Sean V. Hum
We present methods for analyzing and designing cylindrical electromagnetic metasurfaces with non-circular cross sections based on conformal transformations. It can be difficult to…
A Discrete Fourier Transform-Based Framework for Analysis and Synthesis of Cylindrical Omega-bianisotropic Metasurfaces
Gengyu Xu, George V. Eleftheriades, Sean V. Hum
This paper presents a framework for analyzing and designing cylindrical omega-bianisotropic metasurfaces, inspired by mode matching and digital signal processing techniques. Using…