284 citations · 1.1k across the 24 of their papers we have counts for
25 papers
C Demonstration Research and Development Plan
Emilio A. Nanni, Martin Breidenbach, Caterina Vernieri +46
C is an opportunity to realize an ee collider for the study of the Higgs boson at GeV, with a well defined upgrade path to 550 GeV while staying on the…
Visualizing femtosecond dynamics with ultrafast electron probes through terahertz compression and time-stamping
Mohamed A. K. Othman, Emma C. Snively, Annika E. Gabriel +9
Visualizing ultrafast dynamics at the atomic scale requires time-resolved pump-probe characterization with femtosecond temporal resolution. For single-shot ultrafast electron diffr…
Distributed Degenerate Band Edge Oscillator
Ahmed F. Abdelshafy, Dmitry Oshmarin, Mohamed A. K. Othman +2
We propose a new class of oscillators by engineering the dispersion of two-coupled periodic waveguides to exhibit a degenerate band edge (DBE). The DBE is an exceptional point of d…
Parallel-Plate Waveguides for Terahertz-Driven MeV Electron Bunch Compression
Mohamed A. K. Othman, Matthias C. Hoffmann, Michael K. Kozina +3
We demonstrate the electromagnetic performance of waveguides for femtosecond electron beam bunch manipulation and compression with strong-field terahertz (THz) pulses. The compress…
Exceptional Points of Degeneracy in Periodic Coupled Waveguides and the Interplay of Gain and Radiation Loss: Theoretical and Experimental Demonstration
Ahmed F. Abdelshafy, Mohamed A. K. Othman, Dmitry Oshmarin +2
We present a novel paradigm for dispersion engineering in coupled transmission lines (CTLs) based on exceptional points of degeneracy (EPDs). We develop a theory for fourth-order E…
Exceptional Points of Degeneracy and Branch Points for Transmission-Line Problems - Linear Algebra and Bifurcation Theory Perspectives
George W. Hanson, Alexander B. Yakovlev, Mohamed Othman +1
We demonstrate several new aspects of exceptional points of degeneracy (EPD) pertaining to propagation in two uniform coupled transmission-line structures. We describe an EPD using…