284 citations · 2.2k across the 91 of their papers we have counts for
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Experimental Demonstration of Degenerate Band Edge in Metallic Periodically-Loaded Circular Waveguide
Mohamed A. K. Othman, Xuyuan Pan, Georgios Atmatzakis +2
We experimentally demonstrate for the first time the degenerate band edge (DBE) condition, namely the degeneracy of four Bloch modes, in loaded circular metallic waveguides. The fo…
Exceptional points of degeneracy and -symmetry in photonic coupled chains of scatterers
Mohamed A. K. Othman, Vincenzo Galdi, Filippo Capolino
We demonstrate the existence of exceptional points of degeneracy (EPD) of periodic eigenstates in non-Hermitian coupled chains of dipolar scatterers. Guided modes supported by thes…
Theory of Exceptional Points of Degeneracy in Uniform Coupled-Waveguides and Balance of Gain and Loss
Mohamed A. K. Othman, Filippo Capolino
We present a transmission line theory of exceptional points of degeneracy (EPD) in coupled-mode guiding structures, i.e., a theory that illustrates the characteristics of coupled e…
Oscillator Based on Lumped Double Ladder Circuit with Band Edge Degeneracy
Dmitry Oshmarin, Farshad Yazdi, Mohamed A. K. Othman +4
An oscillator design based on a periodic, double ladder resonant circuit is proposed. The circuit exhibits a degenerate band edge (DBE) in the dispersion diagram of its phase-frequ…
Theory of Double Ladder Lumped Circuits With Degenerate Band Edge
Jeff Sloan, Mohamed A. K. Othman, Filippo Capolino
A conventional periodic LC ladder circuit forms a transmission line that has a regular band edge between a pass and a stop band. Here for the first time we develop the theory of si…
Bridging the Gap between Crosslinking Chemistry and Directed Assembly of Metasurfaces Using Electrohydrodynamic Flow
William Thrift, Cuong Nguyen, Mahsa Darvishzadeh-Varcheie +4
Advances in understanding chemical and physical driving forces in self-assembly allow the fabrication of unique nanoarchitectures with subwavelength building blocks as the basis fo…
Photoinduced Magnetic Nanoprobe Excited by Azimuthally Polarized Vector Beam
Caner Guclu, Mehdi Veysi, Filippo Capolino
The concept of magnetic nanoprobes (or magnetic nanoantennas) providing a magnetic near-field enhancement and vanishing electric field is presented and investigated, together with…
Focused Azimuthally Polarized Vector Beam and Spatial Magnetic Resolution below the Diffraction Limit
Mehdi Veysi, Caner Guclu, Filippo Capolino
An azimuthally electric-polarized vector beam (APB), with a polarization vortex, has a salient feature that it contains a magnetic-dominant region within which electric field ideal…
Electric field enhancement with plasmonic colloidal nanoantennas excited by a silicon nitride waveguide
Mahsa Darvishzadeh-Varcheie, Caner Guclu, Regina Ragan +2
We investigate the feasibility of CMOS-compatible optical structures to develop novel integrated spectroscopy systems. We show that local field enhancement is achievable utilizing…
Low Starting Electron Beam Current in Degenerate Band Edge Oscillators
Mohamed A. K Othman, Mehdi Veysi, Alexander Figotin +1
We propose a new principle of operation in vacuum electron-beam-based oscillators that leads to a low beam current for starting oscillations. The principle is based on super synchr…