100 citations · 186 across the 8 of their papers we have counts for
9 papers
Design of a Modified Coupled Resonators Optical Waveguide Supporting a Frozen Mode
Mohamed Y. Nada, Tarek Mealy, Md Shafiqul Islam +5
We design a three-way silicon optical waveguide with the Bloch dispersion relation supporting a stationary inflection point (SIP). The SIP is a third order exceptional point of deg…
Triple Ladder Lumped Circuit with Sixth Order Modal Exceptional Degeneracy
Farshad Yazdi, Alireza Nikzamir, Tarek Mealy +2
We introduce a circuit topology based on a simple triple-ladder circuit realized with lumped reactive components that provides a sixth order degenerate band-edge (6DBE). The 6DBE i…
Frozen Mode in Three-Way Periodic Microstrip Coupled Waveguide
Mohamed Y. Nada, Tarek Mealy, Filippo Capolino
We demonstrate theoretically and experimentally that a periodic three-way microstrip coupled waveguide exhibits a stationary inflection point (SIP). The SIP is a third order except…
Ultra-Sensitive Radio Frequency Biosensor at an Exceptional Point of Degeneracy induced by Time Modulation
Hamidreza Kazemi, Amirhossein Hajiaghajani, Mohamed Y. Nada +4
We exploit the premises of exceptional points of degeneracy (EPDs) induced in linear time-periodic (LTP) systems to achieve extremely sensitive biosensors. The EPD is formed in a s…
Exceptional Point of Sixth Order Degeneracy in a Modified Coupled Resonators Optical Waveguide
Mohamed Y. Nada, Filippo Capolino
We demonstrate for the first time the occurrence of a sixth order exceptional point of degeneracy (EPD) in a realistic multimode optical photonic structure by using a modified peri…
Experimental Demonstration of Exceptional Points of Degeneracy in Linear Time Periodic Systems and Exceptional Sensitivity
Hamidreza Kazemi, Mohamed Y. Nada, Alireza Nikzamir +2
We present the experimental demonstration of the occurrence of exceptional points of degeneracy (EPDs) in a single resonator by introducing a linear time-periodic variation of one…
Exceptional Points of Degeneracy Induced by Linear Time-Periodic Variation Hamidreza
Hamidreza Kazemi, Mohamed Y. Nada, Tarek Mealy +2
We present a general theory of exceptional points of degeneracy (EPD) in periodically time-variant systems that do not necessarily require the presence of loss or gain, and we show…
Theory of Coupled Resonator Optical Waveguides (CROW) Exhibiting High Order Exceptional Points of Degeneracy
Mohamed Y. Nada, Mohamed A. K. Othman, Filippo Capolino
We present a novel approach and a theoretical framework for generating high order exceptional points of degeneracy (EPD) in photonic structures based on periodic coupled resonators…
Giant resonance and anomalous quality factor scaling in coupled resonator optical waveguides at the degenerate band edge
Mohamed Y. Nada, Mohamed A. K. Othman, Ozdal Boyraz +1
We propose a novel scheme for enhancing the quality factor of coupled resonators optical waveguides (CROWs) when operating near a degenerate band edge (DBE). A DBE is a four-mode e…