1.9k citations · 3.7k across the 27 of their papers we have counts for
28 papers
Non-Hermitian Floquet-Free Analytically Solvable Time Dependant Systems
Hamed Ghaemi-Dizicheh, Hamidreza Ramezani
The non-Hermitian models, which are symmetric under parity (P) and time-reversal (T) operators, are the cornerstone for the fabrication of new ultra-sensitive optoelectronic device…
Anomalous relocation of topological states
Hamidreza Ramezani
I show that a single embedded non-Hermitian defect in a one-dimensional topological system at certain degrees of non-Hermiticity can remove the topological mode from the edge and r…
Observation of Robust Zero Energy Extended States
Jannatul Ferdous, Cem Yuce, Andrea Alù +1
Topological edge states arise at the interface of two topologically-distinct structures and have two distinct features: they are localized and robust against symmetry protecting di…
Coexistence of extended and localized states in one-dimensional non-Hermitian Anderson model
Cem Yuce, Hamidreza Ramezani
In one-dimensional Hermitian tight-binding models, mobility edges separating extended and localized states can appear in the presence of properly engineered quasi-periodical potent…
Spectral Singularities with Directional Sensitivity
Hamidreza Ramezani
We propose a class of spectral singularities that are sensitive to the direction of excitation and are arising in nonlinear systems with broken parity symmetry. These spectral sing…
Diffraction-free beam propagation at the exceptional point of non-Hermitian Glauber Fock lattices
Cem Yuce, Hamidreza Ramezani
We construct localized beams that are located at the edge of a non-Hermitian Glauber Fock (NGF) lattice made of coupled waveguides and can propagate for a long distance without alm…