Christos Tserkezis
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View article: An S-matrix Formalism for the Nonclassical Optical Response of Plasmonic Sphere Aggregates
An S-matrix Formalism for the Nonclassical Optical Response of Plasmonic Sphere Aggregates Open
A computational method for the scattering of light by multiple nonclassical plasmonic nanospheres, each of which has multiple (non-)concentric dielectric or metallic layers, is presented. The electromagnetic (EM) response of the free elect…
View article: Analytic methods in electron energy-loss and cathodoluminescence spectroscopy of planar and spherical nanostructures: tutorial
Analytic methods in electron energy-loss and cathodoluminescence spectroscopy of planar and spherical nanostructures: tutorial Open
In recent years, fast electrons have emerged as ideal probes for exploring the optical properties of nanoscale matter with sub-meV energy resolution and atomic-scale spatial resolution. Considering the remarkable progress in cathodolumines…
View article: Nonlocality in photonic materials and metamaterials: roadmap
Nonlocality in photonic materials and metamaterials: roadmap Open
Photonic technologies continue to drive the quest for new optical materials with unprecedented responses. A major frontier in this field is the exploration of nonlocal (spatially dispersive) materials, going beyond the local, wavevector-in…
View article: Analytic methods in electron energy-loss and cathodoluminescence spectroscopy of planar and spherical nanostructures: tutorial
Analytic methods in electron energy-loss and cathodoluminescence spectroscopy of planar and spherical nanostructures: tutorial Open
In recent years, fast electrons have emerged as ideal probes for exploring the optical properties of nanoscale matter with sub-meV energy resolution and atomic-scale spatial resolution. Considering the remarkable progress in cathodolumines…
View article: Analytic methods in electron energy-loss and cathodoluminescence spectroscopy of planar and spherical nanostructures: tutorial
Analytic methods in electron energy-loss and cathodoluminescence spectroscopy of planar and spherical nanostructures: tutorial Open
In recent years, fast electrons have emerged as ideal probes for exploring the optical properties of nanoscale matter with sub-meV energy resolution and atomic-scale spatial resolution. Considering the remarkable progress in cathodolumines…
View article: Tunable exciton polaritons in biased bilayer graphene
Tunable exciton polaritons in biased bilayer graphene Open
By harnessing the unique properties of bilayer graphene, we present a flexible platform for achieving electrically tunable exciton polaritons within a microcavity. Using a semiclassical approach, we solve Maxwell's equations within the cav…
View article: Self-Similar Plasmonic Nanolenses: Mesoscopic Ensemble Averaging and Chiral Light–Matter Interactions
Self-Similar Plasmonic Nanolenses: Mesoscopic Ensemble Averaging and Chiral Light–Matter Interactions Open
We investigate how the near-field enhancement of self-similar nanolenses, made of three plasmonic nanospheres with decreasing sizes and separations, is affected by quantum corrections in the optical response of the metal and by fabrication…
View article: Quantum-Hydrodynamic Modal Perspective on Plasmonic Gap Structures
Quantum-Hydrodynamic Modal Perspective on Plasmonic Gap Structures Open
Plasmonic gap structures are among the few configurations capable of generating extreme light confinement, finding applications in surface-enhanced spectroscopy, ultrasensitive detection, photocatalysis and more. Their plasmonic response u…
View article: Quantum Mechanics in Plasmonic Nanocavities: from Theory to Applications
Quantum Mechanics in Plasmonic Nanocavities: from Theory to Applications Open
Quantum mechanical effects in plasmonic nanocavities have attracted strong interest in the last two decades, related to both their experimental realization and implementation in technological applications, and to the challenges that need t…
View article: The Uniqueness Theorem for Nonlocal Hydrodynamic Media
The Uniqueness Theorem for Nonlocal Hydrodynamic Media Open
sponsorship: The work of Christos Mystilidis, Guy A. E. Vandenbosch, and Xuezhi Zheng was supported in part by the C1 Project under Grant C14/19/083, in part by Interdisciplinary Research Network (IDN) Project under Grant IDN/20/014, and i…
View article: Non-Markovian effects in long-range polariton-mediated energy transfer
Non-Markovian effects in long-range polariton-mediated energy transfer Open
Intramolecular energy transfer driven by near-field effects plays an important role in applications ranging from biophysics and chemistry to nano-optics and quantum communications. Advances in strong light-matter coupling in molecular syst…
View article: Self-similar plasmonic nanolenses: mesoscopic ensemble averaging and chiral light-matter interactions
Self-similar plasmonic nanolenses: mesoscopic ensemble averaging and chiral light-matter interactions Open
We investigate how the near-field enhancement of self-similar nanolenses, made of three plasmonic nanospheres with decreasing sizes and separations, is affected by quantum corrections in the optical response of the metal, and by fabricatio…
View article: Tunable exciton-polaritons in band-gap engineered hexagonal boron nitride
Tunable exciton-polaritons in band-gap engineered hexagonal boron nitride Open
We\nshow that hexagonal boron nitride (hBN), a two-dimensional insulator,\nwhen subjected to an external superlattice potential forms a paradigm\nfor electrostatically tunable excitons in the near- and mid-ultraviolet\n(UV). With a combina…
View article: Dirac plasmon polaritons and magnetic modes in topological-insulator nanoparticles
Dirac plasmon polaritons and magnetic modes in topological-insulator nanoparticles Open
We demonstrate the existence of previously unreported\nmagnetic\nmodes with record-high magnetic Purcell factors (PFs) in topological-insulator\nnanospheres. Focusing on bismuth selenide (Bi2Se3), and based on full electromagnetic Mie theo…
View article: Surface-Response Formalism for Light–Matter Interactions in Mesoscopic Plasmonics
Surface-Response Formalism for Light–Matter Interactions in Mesoscopic Plasmonics Open
The surface-response formalism (SRF) embodied by the Feibelman d parameters offers a promising route for bridging the gap between the classical and quantum worlds in plasmonics. Without radically affecting the description of the system (ty…
View article: Nonlocal effects in plasmon-emitter interactions
Nonlocal effects in plasmon-emitter interactions Open
Nonlocal and quantum mechanical phenomena in noble metal nanostructures become increasingly crucial when the relevant length scales in hybrid nanostructures reach the few-nanometer regime. In practice, such mesoscopic effects at metal–diel…
View article: Electron beams traversing spherical nanoparticles: Analytic and numerical treatment
Electron beams traversing spherical nanoparticles: Analytic and numerical treatment Open
We present an analytic, Mie theory-based solution for the energy loss and the photon-emission probabilities in the interaction of spherical nanoparticles with electrons passing nearby and through them, in both cathodoluminescence and elect…
View article: Self-hybridisation between interband transitions and Mie modes in dielectric nanoparticles
Self-hybridisation between interband transitions and Mie modes in dielectric nanoparticles Open
We discuss the possibility of self-hybridisation in high-index dielectric nanoparticles, where Mie modes of electric or magnetic type can couple to the interband transitions of the material, leading to spectral anticrossings. Starting with…
View article: A Dedicated Modeling Scheme for Nonclassical Optical Response From the Nanosphere-on-Mirror Structure
A Dedicated Modeling Scheme for Nonclassical Optical Response From the Nanosphere-on-Mirror Structure Open
Within the framework of the T-matrix method, we present a modeling tool that predicts the optical response from the Nanosphere-on-Mirror (NSoM) construct. The nonclassical effects in metals are accounted for by the nonlocal hydrodynamic Dr…
View article: Dirac plasmon polaritons and magnetic modes in topological-insulator nanoparticles
Dirac plasmon polaritons and magnetic modes in topological-insulator nanoparticles Open
We demonstrate the existence of previously unreported magnetic modes with record-high magnetic Purcell factors in topological-insulator nanospheres. Focusing on bismuth selenide (Bi$_{2}$Se$_{3}$), and based on full electromagnetic Mie the…
View article: Tunable exciton polaritons in band-gap engineered hexagonal boron nitride
Tunable exciton polaritons in band-gap engineered hexagonal boron nitride Open
We show that hexagonal boron nitride (hBN), a two-dimensional insulator, when subjected to an external superlattice potential forms a new paradigm for electrostatically tunable excitons in the near- and mid-ultraviolet (UV). The imposed po…
View article: Quantum-informed plasmonics for strong coupling: the role of electron spill-out
Quantum-informed plasmonics for strong coupling: the role of electron spill-out Open
The effect of nonlocality on the optical response of metals lies at the forefront of research in nanoscale physics and, in particular, quantum plasmonics. In alkali metals, nonlocality manifests predominantly as electron density spill-out …
View article: Self-hybridisation between interband transitions and Mie modes in dielectric nanoparticles
Self-hybridisation between interband transitions and Mie modes in dielectric nanoparticles Open
We discuss the possibility of self-hybridisation in high-index dielectric nanoparticles, where Mie modes of electric or magnetic type can couple to the interband transitions of the material, leading to spectral anticrossings. Starting with…
View article: A Dedicated Modelling Scheme for Nonclassical Optical Response from the Nanosphere-on-Mirror Structure
A Dedicated Modelling Scheme for Nonclassical Optical Response from the Nanosphere-on-Mirror Structure Open
Within the framework of the T-matrix method, we present a modeling tool that predicts the optical response from the Nanosphere-on-Mirror (NSoM) construct. The nonclassical effects in metals are accounted for by the nonlocal hydrodynamic Dr…
View article: Electron beams traversing spherical nanoparticles: analytic and numerical treatment
Electron beams traversing spherical nanoparticles: analytic and numerical treatment Open
We present an analytic, Mie theory-based solution for the energy-loss and the photon-emission probabilities in the interaction of spherical nanoparticles with electrons passing nearby and through them, in both cathodoluminescence and elect…
View article: The Uniqueness Theorem for Nonlocal Hydrodynamic Media
The Uniqueness Theorem for Nonlocal Hydrodynamic Media Open
We investigate a fundamental electromagnetic theorem, namely the uniqueness theorem, in the context of nonlocal electromagnetics, as simulated by a popular semiclassical model, the Hydrodynamic Drude Model (HDM) and extensions thereof such…
View article: Nonlocal effects in atom-plasmon interactions
Nonlocal effects in atom-plasmon interactions Open
Nonlocal and quantum mechanical phenomena in noble metal nanostructures become increasingly crucial when the relevant length scales in hybrid nanostructures reach the few-nanometer regime. In practice, such mesoscopic effects at metal-diel…
View article: Gain-compensated cavities for the dynamic control of light-matter interactions
Gain-compensated cavities for the dynamic control of light-matter interactions Open
We propose an efficient approach for actively controlling the Rabi oscillations in nanophotonic emitter-cavity analogs based on the presence of an element with optical gain. Inspired by recent developments in parity-time (PT)-symmetry phot…
View article: Gain-compensated cavities for the dynamic control of light-matter interactions
Gain-compensated cavities for the dynamic control of light-matter interactions Open
We propose an efficient approach for actively controlling the Rabi oscillations in emitter-cavity hybrids based on the presence of an element with optical gain. Inspired by recent developments in parity-time ($\mathcal{PT}$)-symmetry photo…
View article: Fundamental issues with light propagation through <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="script">PT</mml:mi></mml:math>-symmetric systems
Fundamental issues with light propagation through -symmetric systems Open
We analyze the emergence of unphysical superluminal group velocities in Su-Schrieffer-Heeger (SSH) parity-time (PT) symmetric chains, and explore the origins of such a behavior. By comparing the band structure of an infinite loss-gain SSH …