685 citations · 2.5k across the 38 of their papers we have counts for
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Biorthogonality of Guided Modes in Non-Hermitian Electromagnetism
Amgad Abdrabou, M. A. Swillam, Şahin K. Özdemir +1
Biorthogonality plays a central role in the analysis of non-Hermitian photonic systems, where modal expansions generally require both right and left eigenstates. While these concep…
-like phase transitions from square roots of supersymmetric Hamiltonians
Jacob L. Barnett, Ramy El-Ganainy
We introduce a general framework for realizing -like phase transitions in non-Hermitian systems without imposing explicit parity--time () symmetry. The…
A topological route to engineering robust and bright supersymmetric laser arrays
Soujanya Datta, Mohammadmahdi Alizadeh, Ramy El-Ganainy +1
In recent years, several proposals that leverage principles from condensed matter and high-energy physics for engineering laser arrays have been put forward. The most important amo…
Resolving the topology of encircling multiple exceptional points
Chitres Guria, Qi Zhong, Sahin K. Ozdemir +3
Non-Hermiticity has emerged as a new paradigm for controlling coupled-mode systems in ways that cannot be achieved with conventional techniques. One aspect of this control that has…
Tracking exceptional points above laser threshold
Kaiwen Ji, Qi Zhong, Li Ge +5
Recent studies on non-Hermitian optical systems having exceptional points (EPs) have revealed a host of unique characteristics associated with these singularities, including unidir…
Non-universality of quantum noise in optical amplifiers operating at exceptional points
L. Simonson, S. K. Ozdemir, A. Eisfeld +2
The concept of exceptional points-based optical amplifiers (EPOAs) has been recently proposed as a new paradigm for miniaturizing optical amplifiers while simultaneously enhancing…
The missing link between standing- and traveling-wave resonators
Qi Zhong, Haoqi Zhao, Liang Feng +3
Optical resonators are structures that utilize wave interference and feedback to confine light in all three dimensions. Depending on the feedback mechanism, resonators can support…
Linear response theory of open systems with exceptional points
A. Hashemi, K. Busch, D. N. Christodoulides +2
Understanding the linear response of any system is the first step towards analyzing its linear and nonlinear dynamics, stability properties, as well as its behavior in the presence…
Chiral Coherent Perfect Absorption on Exceptional Surfaces
S. Soleymani, Q. Zhong, M. Mokim +3
Engineering the transport of radiation and its interaction with matter using non-Hermiticity, particularly through spectral degeneracies known as exceptional points(EPs), is an eme…
New perspective on chiral exceptional points with application to discrete photonics
A. Hashemi, S. M. Rezaei, S. K. Ozdemir +1
Chiral exceptional points (CEPs) have been shown to emerge in traveling wave resonators via asymmetric back scattering from two or more nano-scatterers. Here, we provide a new pers…
Hierarchical construction of higher-order exceptional points
Q. Zhong, J. Kou, S. K. Ozdemir +1
The realization of higher-order exceptional points (HOEPs) can lead to orders of magnitude enhancement in light-matter interactions beyond the current fundamental limits. Unfortuna…
Control of spontaneous emission dynamics in microcavities with chiral exceptional surfaces
Q. Zhong, A. Hashemi, S. K. Ozdemir +1
We investigate spontaneous emission from a quantum emitter located within the mode volume of a microring resonator that features chiral exceptional points. We show that this config…
Coherent virtual absorption of light in microring resonators
Q. Zhong, L. Simonson, T. Kottos +1
Light trapping and radiation process from linear reciprocal photonic resonators is one of the fundamental processes in optical science and engineering. Recently, the concept of coh…
Direct generation of tunable orbital angular momentum beams in microring lasers with broadband exceptional points
William E. Hayenga, Jinhan Ren, Midya Parto +7
Non-Hermitian exceptional points (EPs) represent a special type of degeneracy where not only the eigenvalues coalesce, but also the eigenstates tend to collapse on each other. Rece…
Supersymmetric Laser Arrays
Mohammad P. Hokmabadi, Nicholas S. Nye, Ramy El-Ganainy +2
The theoretical framework of supersymmetry (SUSY) aims to relate bosons and fermions -- two profoundly different species of particles -- and their interactions. While this space-ti…
Generalized Parity-Time Symmetry Condition for Enhanced Sensor Telemetry
Pai-Yen Chen, Maryam Sakhdari, Mehdi Hajizadegan +4
Wireless sensors based on micro-machined tunable resonators are important in a variety of applications, ranging from medical diagnosis to industrial and environmental monitoring.Th…
Experimental Realization of Multiple Topological Edge States in a One-Dimensional Photonic Lattice
Zhifeng Zhang, Mohammad Teimourpour, Jake Arkinstall +5
Topological photonic systems offer light transport that is robust against defects and disorder, promising a new generation of chip-scale photonic devices and facilitating energy-ef…
Sensing with exceptional surfaces: combining sensitivity with robustness
Q. Zhong, J. Ren, M. Khajavikhan +3
Exceptional points (EPs) are singularities that arise in non-Hermitian physics. Current research efforts focus only on systems supporting isolated EPs characterized by increased se…
Symmetry in optics and photonics: a group theory approach
B. M. Rodríguez-Lara, Ramy El-Ganainy, Julio Guerrero
Group theory (GT) provides a rigorous framework for studying symmetries in various disciplines in physics ranging from quantum field theories and the standard model to fluid mechan…
Non-Hermitian engineering of synthetic saturable absorbers
M. H. Teimourpour, A. Rahman, K. Srinivasan +1
We introduce a new type of synthetic saturable absorbers based on quantum inspired photonic arrays whose linear light transport characteristics can be derived via bosonic algebra.…
Non-Hermitian engineering of single mode two dimensional laser arrays
Mohammad H. Teimourpour, Li Ge, Demetrios N. Christodoulides +1
A new scheme for building two dimensional laser arrays that operate in the single supermode regime is proposed. This is done by introducing an optical coupling between the laser ar…
Nonlinear modal interactions in parity-time () symmetric lasers
Li Ge, Ramy El-Ganainy
Parity-time () symmetric lasers have attracted considerable attention lately due to their promising applications and intriguing properties, such as free spectral range dou…
Optomechanical interactions in non-Hermitian photonic molecules
David W. Schönleber, Alexander Eisfeld, Ramy El-Ganainy
We study optomechanical interactions in non-Hermitian photonic molecules that support two photonic states and one acoustic mode. The nonlinear steady-state solutions and their line…
Light transport in PT-invariant photonic structures with hidden symmetries
M. H. Teimourpour, R. El-Ganainy, A. Eisfeld +2
We introduce a recursive bosonic quantization technique for generating classical PT photonic structures that possess hidden symmetries and higher order exceptional points. We study…