A5066377359- Quantum Mechanics and Non-Hermitian Physics
- Nonlinear Photonic Systems
- Topological Materials and Phenomena
- Advanced Mathematical Theories and Applications
- Quantum chaos and dynamical systems
- Nonlinear Waves and Solitons
- Quasicrystal Structures and Properties
- Advanced Fiber Laser Technologies
- Algebraic and Geometric Analysis
University of Crete
2021-2024
FORTH Institute of Electronic Structure and Laser
2022
Advances in topological photonics and non-Hermitian optics have drastically changed our perception on how interdisciplinary concepts may empower unprecedented applications. Bridging the two areas could uncover reciprocity between topology non-Hermiticity complex systems. So far, such endeavors focused mainly linear-optics regime. Here, we establish a nonlinear platform for control of parity-time (PT) symmetry edge states. Experimentally, demonstrate that optical nonlinearity effectively...
Non-Hermitian topological systems simultaneously possess two antagonistic features: ultrasensitivity due to exceptional points and robustness of zero-energy modes, it is unclear which one prevails under different perturbations. We study that question by applying the pseudospectrum theory on prototypical non-Hermitian Su-Schrieffer-Heeger lattice. Topological modes around underlying third-order point (EP3) are robust with respect chiral perturbations but sensitive diagonal In fact, exactly at...
Wave dynamics in disordered open media is an intriguing topic and has lately attracted a lot of attention non-Hermitian physics, especially photonics. In fact, spatial distributions gain loss elements are physically possible the context integrated photonic waveguide arrays. these type lattices, counterintuitive quantized jumps along propagation direction appear strong disorder limit (where all eigenstates localized), they have also been recently experimentally observed. We systematically...
Wave dynamics in disordered open media is an intriguing topic, and has lately attracted a lot of attention non-Hermitian physics, especially photonics. In fact, spatial distributions gain loss elements are physically possible the context integrated photonic waveguide arrays. particular, these type lattices, counter-intuitive quantized jumps along propagation direction appear strong disorder limit (where all eigenstates localized) they have also been recently experimentally observed. We...
We present a method for constructing infinite lattices that exhibit higher order exceptional points (HEPs), contrary to most studies are devoted finite systems. Their sensitivity in terms of pseudospectra is studied detail.
Higher order exceptional points (sensitivity) and topological protection (robustness) are two antagonistic effects. We examine their interplay on the prototypical non-Hermitian SSH lattice in terms of pseudospectra theory its geometric features.
We demonstrate that optical nonlinearity can effectively modulate the loss of a topological defect waveguide in non-Hermitian photonic lattice, leading to switching between PT and non-PT-symmetric regimes control zero modes.
We demonstrate that optical nonlinearity can effectively modulate the loss of a defect potential in non-Hermitian topological lattice, leading to single-channel switching between PT and non-PT-symmetric regimes maneuver zero modes.