105 citations · 594 across the 26 of their papers we have counts for
28 papers
Bogoliubov excitations of a Bose-Einstein condensate in the presence of the non-Hermitian skin effect
Carlo Panu, Ulf Peschel, Oleg A. Egorov +2
The non-Hermitian skin effect is one of the most remarkable topological features of non-conservative physics. It causes a macroscopic accumulation of states at the boundaries of a…
Dynamical development of long-range spatial coherence in non-equilibrium bosonic condensation
Bianca Rae Fabricante, Dąbrówka Biegańska, Paolo Comaron +14
Development of spontaneous coherence is one of the hallmarks of bosonic condensation in a variety of physical systems, such as cold atoms, confined photons, and hybrid light-matter…
Momentum-space non-Hermitian skin effect in an exciton-polariton system
Yow-Ming, Hu, Mateusz Król +11
Localization of a macroscopic number of eigenstates on a real-space boundary, known as the non-Hermitian skin effect, is one of the striking topological features emerging from non-…
Zitterbewegung Effect and Quantum Geometry in Non-Hermitian Exciton-Polariton Systems
Yow-Ming Robin Hu, Elena A. Ostrovskaya, Eliezer Estrecho
In this work, we analytically derive a semi-classical equation of motion describing the zitterbewegung effects arising in the dynamics of wavepackets in non-Hermitian systems. In H…
Emergent momentum-space topological pseudospin defects in non-Hermitian systems
Yow-Ming Robin Hu, Elena A. Ostrovskaya, Alexander Yakimenko +1
Topological defects are central to modern physics, from spintronics to photonics, due to their robustness and potential application in information processing. In this work, we disc…
Intrinsically chiral exciton polaritons in an atomically-thin semiconductor
Matthias J. Wurdack, Ivan Iorsh, Sarka Vavreckova +15
Photonic bound states in the continuum (BICs) have emerged as a versatile tool for enhancing light-matter interactions by strongly confining light fields. Chiral BICs are photonic…
Robust Room-Temperature Polariton Condensation and Lasing in Scalable FAPbBr Perovskite Microcavities
Mateusz Król, Mitko Oldfield, Matthias Wurdack +6
Exciton-polariton condensation in direct bandgap semiconductors strongly coupled to light enables a broad range of fundamental studies and applications like low-threshold and elect…
Coherence of a non-equilibrium polariton condensate across the interaction-mediated phase transition
P. Comaron, E. Estrecho, M. Wurdack +9
The emergence of spatial coherence in a confined two-dimensional Bose gas of exciton-polaritons with tuneable interactions offers a unique opportunity to explore the role of intera…
Narrow-linewidth exciton-polariton laser
Bianca Rae Fabricante, Mateusz Król, Matthias Wurdack +8
Exciton-polariton laser is a promising source of coherent light for low-energy applications due to its low-threshold operation. However, a detailed experimental study of its spectr…
Generalized Quantum Geometric Tensor in a Non-Hermitian Exciton-Polariton System
Y. -M. Robin Hu, Elena A. Ostrovskaya, Eliezer Estrecho
In this work, we review different generalizations of the quantum geometric tensor (QGT) in two-band non-Hermitian systems and propose a protocol for measuring them in experiments.…
Wave packet dynamics in a non-Hermitian exciton-polariton system
Y. -M. Robin Hu, Elena A. Ostrovskaya, Eliezer Estrecho
We theoretically investigate the dynamics of wave packets in a generic, non-Hermitian, optically anisotropic exciton-polariton system that exhibits degeneracies of its complex-valu…
Exciton-polaron interactions in monolayer WS
Jack B. Muir, Jesper Levinsen, Stuart K. Earl +12
Interactions between quasiparticles are of fundamental importance and ultimately determine the macroscopic properties of quantum matter. A famous example is the phenomenon of super…
Negative-mass exciton polaritons induced by dissipative light-matter coupling in an atomically thin semiconductor
M. Wurdack, T. Yun, M. Katzer +5
Dispersion engineering is a powerful and versatile tool that can vary the speed of light signals and induce negative-mass effects in the dynamics of particles and quasiparticles. H…
Fabrication of high-quality PMMA/SiO spaced planar microcavities for strong coupling of light with monolayer WS excitons
Tinghe Yun, Eliezer Estrecho, Andrew G. Truscott +2
Exciton polaritons in atomically-thin transition metal dichalcogenide crystals (monolayer TMDCs) have emerged as a promising candidate to enable topological transport, ultra-effici…
Enhancing ground state population and macroscopic coherence of room-temperature WS polaritons through engineered confinement
M. Wurdack, E. Estrecho, S. Todd +3
Exciton-polaritons (polaritons herein) in transition-metal dichalcogenide monolayers have attracted significant attention due to their potential for polariton-based optoelectronics…
Influence of direct deposition of dielectric materials on the optical response of monolayer WS
Tinghe Yun, Matthias Wurdack, Maciej Pieczarka +8
The integration of two-dimensional transition metal dichalcogenide crystals (TMDCs) into a dielectric environment is critical for optoelectronic and photonic device applications. H…
Motional narrowing, ballistic transport, and trapping of room-temperature exciton polaritons in an atomically-thin semiconductor
M. Wurdack, E. Estrecho, S. Todd +7
Atomically-thin transition metal dichalcogenide crystals (TMDCs) hold great promise for future semiconductor optoelectronics due to their unique electronic and optical properties.…
Topological phase transition in an all-optical exciton-polariton lattice
M. Pieczarka, E. Estrecho, S. Ghosh +8
Topological insulators are a class of electronic materials exhibiting robust edge states immune to perturbations and disorder. This concept has been successfully adapted in photoni…
Direct Measurement of a Non-Hermitian Topological Invariant in a Hybrid Light-Matter System
Rui Su, Eliezer Estrecho, Dąbrówka Biegańska +7
Topology is central to understanding and engineering materials that display robust physical phenomena immune to imperfections. Different topological phases of matter are characteri…
Collective excitations of exciton-polariton condensates in a synthetic gauge field
D. Biegańska, M. Pieczarka, E. Estrecho +7
Collective (elementary) excitations of quantum bosonic condensates, including condensates of exciton polaritons in semiconductor microcavities, are a sensitive probe of interpartic…
Long-lived populations of momentum- and spin-indirect excitons in monolayer WSe
Shao-Yu Chen, Maciej Pieczarka, Matthias Wurdack +6
Monolayer transition metal dichalcogenides are a promising platform to investigate many-body interactions of excitonic complexes. In monolayer tungsten diselenide, the ground-state…
Observation of quantum depletion in a nonequilibrium exciton-polariton condensate
Maciej Pieczarka, Eliezer Estrecho, Maryam Boozarjmehr +9
The property of superfluidity, first discovered in liquid 4He, is closely related to Bose-Einstein condensation (BEC) of interacting bosons. However, even at zero temperature, when…
Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation
E. Estrecho, T. Gao, N. Bobrovska +12
Bosonic condensates of exciton polaritons (light-matter quasiparticles in a semiconductor) provide a solid-state platform for studies of non-equilibrium quantum systems with a spon…
Effect of optically-induced potential on the energy of trapped exciton-polaritons below the condensation threshold
M. Pieczarka, M. Boozarjmehr, E. Estrecho +8
Exciton-polaritons (polaritons herein) offer a unique nonlinear platform for studies of collective macroscopic quantum phenomena in a solid state system. Shaping of polariton flow…