1.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, BerkeleyUS83 papers
- Lawrence Berkeley National LaboratoryUS59 papers
- Centre National de la Recherche ScientifiqueFR41 papers
- Al-Farabi Kazakh National UniversityKZ36 papers
- Korea Astronomy and Space Science InstituteKR23 papers
- Korea University of Science and TechnologyKR23 papers
- National Taiwan UniversityTW22 papers
- Ulugh Beg Astronomical InstituteUZ19 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR18 papers
- Fesenkov Astrophysical InstituteKZ18 papers
- Chinese Academy of SciencesCN17 papers
- Institut de Recherche en Astrophysique et PlanétologieFR17 papers
21 papers · 1 filter
Zak Phase Dislocations in Trimer Lattices
Tileubek Uakhitov, Abdybek Urmanov, Serik E. Kumekov +1
Wave propagation in periodic media is governed by energy-momentum relation and geometric phases characterizing band topology, such as Zak phase in one-dimensional lattices. We demo…
Electromagnetic fields between moving mirrors: Singular waveforms inside Doppler cavities
Theodoros T. Koutserimpas, Constantinos Valagiannopoulos
Phenomena of wave propagation in dynamically varying structures have reemerged as the temporal variations of the medium's properties can extend the possibilities for electromagneti…
Spatial Control of Localized Oscillations in Arrays of Coupled Laser Dimers
Joniald Shena, Yannis Kominis, Anastasios Bountis +1
Arrays of coupled semiconductor lasers are systems possessing radically complex dynamics that makes them useful for numerous applications in beam forming and beam shaping. In this…
Radically Tunable Ultrafast Photonic Oscillators via Differential Pumping
Yannis Kominis, Anastassios Bountis, Vassilios Kovanis
We present the controllability capabilities for the limit cycles of an extremely tunable photonic oscillator, consisting of two coupled semiconductor lasers. We show that this syst…
Enhanced stability, bistability, and exceptional points in saturable active photonic couplers
Yertay Zhiyenbayev, Yannis Kominis, Constantinos Valagiannopoulos +2
A generic photonic coupler with active and lossy parts, gain saturation and asymmetric characteristics is examined. Saturable activity is shown to be able to enhance the overall st…
Antiresonances and Ultrafast Resonances in a Twin Photonic Oscillator
Yannis Kominis, Kent D. Choquette, Anastasios Bountis +1
We consider the properties of the small-signal modulation response of symmetry-breaking phase-locked states of twin coupled semiconductor lasers. The extended stability and the var…
Exceptional Points in Two Dissimilar Coupled Diode Lasers
Yannis Kominis, Kent D. Choquette, Anastassios Bountis +1
We show the abundance of Exceptional Points in the generic asymmetric configuration of two coupled diode lasers, under nonzero optical detuning and differential pumping. We pinpoin…
Presence of temporal dynamical instabilities in topological insulator lasers
S. Longhi, Y. Kominis, V. Kovanis
Topological insulator lasers are a newly introduced kind of lasers in which light snakes around a cavity without scattering. Like for an electron current in a topological insulator…
Spectral Signatures of Exceptional Points and Bifurcations in the Fundamental Active Photonic Dimer
Yannis Kominis, Vassilios Kovanis, Tassos Bountis
The fundamental active photonic dimer consisting of two coupled quantum well lasers is investigated in the context of the rate equation model. Spectral transition properties and ex…
Controllable Asymmetric Phase-Locked States of the Fundamental Active Photonic Dimer
Yannis Kominis, Vassilios Kovanis, Tassos Bountis
Coupled semiconductor lasers are systems possessing complex dynamics that are interesting for numerous applications in photonics. In this work, we investigate the existence and the…
Judiciously distributing laser emitters to shape the desired far field patterns
Constantinos A. Valagiannopoulos, Vassilios Kovanis
The far-field pattern of a simple one-dimensional laser array of emitters radiating into free space is considered. In the path of investigating the inverse problem for their near f…
Extreme waves and branching flows in optical media
M. Mattheakis, G. P. Tsironis
We address light propagation properties in complex media consisting of random distributions of lenses that have specific focusing properties. We present both analytical and numeric…
Manipulating polarized light with a planar slab of Black Phosphorus
Constantinos A. Valagiannopoulos, Marios Mattheakis, Sharmila N. Shirodkar +1
Wave polarization contains valuable information for electromagnetic signal processing and the ability to manipulate it can be extremely useful in photonic devices. In this work, we…
Magnified imaging based on non-Hermitian nonlocal cylindrical metasurfaces
Silvio Savoia, Constantinos A. Valagiannopoulos, Francesco Monticone +3
We show that a cylindrical lensing system composed of two metasurfaces with suitably tailored non-Hermitian (i.e., with distributed gain and loss) and nonlocal (i.e., spatially dis…
Epsilon-Near-Zero behavior from plasmonic Dirac point: theory and realization using two-dimensional materials
Marios Mattheakis, Constantinos A. Valagiannopoulos, Efthimios Kaxiras
The electromagnetic response of a two-dimensional metal embedded in a periodic array of a dielectric host can give rise to a plasmonic Dirac point that emulates Epsilon-Near-Zero (…
Conical intersections for light and matter waves
Daniel Leykam, Anton S. Desyatnikov
We review the design, theory, and applications of two dimensional periodic lattices hosting conical intersections in their energy-momentum spectrum. The best known example is the D…
Phase transition in PT symmetric active plasmonic systems
M. Mattheakis, T. Oikonomou, M. I. Molina +1
Surface plasmon polaritons (SPPs) are coherent electromagnetic surface waves trapped on an insulator-conductor interface. The SPPs decay exponentially along the propagation due to…
Electromagnetic Energy Sink
Constantinos A. Valagiannopoulos, Joni Vehmas, Constantin R. Simovski +2
The ideal black body fully absorbs all incident rays, that is, all propagating waves created by arbitrary sources. The known idealized realization of a black body is the perfectly…
Control of Power in Parity-Time -Symmetric Lattices
Maksim Kozlov, G. P. Tsironis
We investigate wave transport properties of Parity-Time (PT) symmetric lattices that are periodically modulated along the direction of propagation. We demonstrate that in the regim…
Lattice topology and spontaneous parametric down-conversion in quadratic nonlinear waveguide arrays
Daniel Leykam, Alexander S. Solntsev, Andrey A. Sukhorukov +1
We analyze spontaneous parametric down-conversion in various experimentally feasible 1D quadratic nonlinear waveguide arrays, with emphasis on the relationship between the lattice'…
Small-world networks of optical fiber lattices
F. Perakis, M. Mattheakis, G. P. Tsironis
We use a simple dynamical model and explore coherent dynamics of wavepackets in complex networks of optical fibers. We start from a symmetric lattice and through the application of…