Special scattering regimes for conical all-dielectric nanoparticles

AV Kuznetsov, A Canós Valero, HK Shamkhi… - Scientific reports, 2022 - nature.com
All-dielectric nanophotonics opens a venue for a variety of novel phenomena and scattering
regimes driven by unique optical effects in semiconductor and dielectric nanoresonators …

Multiband topological states in non-Hermitian photonic crystals

J Jiang, B Yan, Y Peng, J **e, A Shi, J Liu - Optics Letters, 2022 - opg.optica.org
Novel phenomena found in non-Hermitian systems and robust edge states have attracted
much attention. When non-Hermitian parameters (gain and loss) are above a critical value …

Quasibound states in the continuum induced by symmetry breaking

DV Novitsky, AS Shalin, D Redka, V Bobrovs… - Physical Review B, 2021 - APS
Bound states in the continuum (BICs) enable unique features in tailoring light-matter
interaction on nanoscale. These radiationless localized states drive theoretically infinite …

CPA-lasing associated with the quasibound states in the continuum in asymmetric non-Hermitian structures

DV Novitsky, AC Valero, A Krotov, T Salgals… - ACS …, 2022 - ACS Publications
Non-Hermitian photonic systems with loss and gain attract much attention due to their
exceptional abilities in molding the flow of light. Introducing asymmetry to the PT-symmetric …

Extreme-parameter non-Hermitian dielectric metamaterials

M Coppolaro, M Moccia, V Caligiuri, G Castaldi… - ACS …, 2020 - ACS Publications
The emerging fields of non-Hermitian optics and photonics are inspiring radically new,
unconventional ways of mixing active and passive constituents to attain exotic light–matter …

Bianisotropic exceptional points in an isolated dielectric nanoparticle

A Canós Valero, V Bobrovs, T Weiss, L Gao… - Physical Review …, 2024 - APS
Exceptional points are spectral singularities of open systems, where several eigenvalues
and eigenvectors coalesce. In photonics, they are associated to remarkable phenomena …

Unambiguous scattering matrix for non-Hermitian systems

A Novitsky, D Lyakhov, D Michels, AA Pavlov… - Physical Review A, 2020 - APS
PT symmetry is a unique platform for light manipulation and versatile use in unidirectional
invisibility, lasing, sensing, etc. Broken and unbroken PT-symmetric states in non-Hermitian …

Exceptional points in all-dielectric structure with only in-plane symmetry breaking

ID Medvedev, AV Kuznetsov, V Bobrovs - Computer Science On-line …, 2024 - Springer
All-dielectric non-Hermitian structures make it possible to obtain unique effect like the
appearance of the exceptional points (EP). A system at EP is sensitive to a small …

Effects of quantum deformation on the Jaynes-Cummings and anti-Jaynes-Cummings models

GM Uhdre, D Cius, FM Andrade - Physical Review A, 2022 - APS
The theory of non-Hermitian systems and the theory of quantum deformations have attracted
a great deal of attention in the past decades. In general, non-Hermitian Hamiltonians are …

Nonlocal homogenization of -symmetric multilayered structures

DV Novitsky, AS Shalin, A Novitsky - Physical Review A, 2019 - APS
Unique and highly tunable optical properties of PT-symmetric systems and metamaterials
enable a plenty of entirely new linear and nonlinear optical phenomena with numerous …