78 citations · 342 across the 23 of their papers we have counts for
24 papers
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…
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…
Anomalous dispersion via dissipative coupling in a quantum well exciton-polariton microcavity
Dąbrówka Biegańska, Maciej Pieczarka, Christian Schneider +3
Although energy level repulsion is typically observed in interacting quantum systems, non-Hermitian physics predicts the effect of level attraction, which occurs when significant e…
Optical properties and dynamics of direct and spatially and momentum indirect excitons in AlGaAs/AlAs quantum wells
Dąbrówka Biegańska, Maciej Pieczarka, Krzysztof Ryczko +5
We present an experimental study on optical properties and dynamics of direct and spatially and momentum indirect excitons in AlGaAs/AlAs quantum wells near the crossover between $…
Bose-Einstein condensation of photons in a vertical-cavity surface-emitting laser
Maciej Pieczarka, Marcin Gębski, Aleksandra N. Piasecka +4
Many bosons can occupy a single quantum state without a limit. This state is described by quantum-mechanical Bose-Einstein statistics, which allows the formation of a Bose-Einstein…
Crossover from exciton-polariton condensation to photon lasing in an optical trap
Maciej Pieczarka, Dąbrówka Biegańska, Christian Schneider +4
Optical trapping has been proven to be an effective method of separating exciton-polariton condensates from the incoherent high-energy excitonic reservoir located at the pumping la…
Bogoliubov excitations of a polariton condensate in dynamical equilibrium with an incoherent reservoir
Maciej Pieczarka, Olivier Bleu, Eliezer Estrecho +9
The classic Bogoliubov theory of weakly interacting Bose gases rests upon the assumption that nearly all the bosons condense into the lowest quantum state at sufficiently low tempe…
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…
Two-dimensional GaO glass: a large scale passivation and protection material for monolayer WS
Matthias Wurdack, Tinghe Yun, Eliezer Estrecho +14
Atomically thin transition metal dichalcogenide crystals (TMDCs) have extraordinary optical properties that make them attractive for future optoelectronic applications. Integration…
Low-energy collective oscillations and Bogoliubov sound in an exciton-polariton condensate
E. Estrecho, M. Pieczarka, M. Wurdack +6
We report the observation of low-energy, low-momenta collective oscillations of an excitonpolariton condensate in a round "box" trap. The oscillations are dominated by the dipole a…
Spatial distribution of an optically induced excitonic reservoir below exciton-polariton condensation threshold
M. Boozarjmehr, M. Steger, K. West +5
Optical trapping and manipulation of microcavity exciton polaritons rely on effective potentials induced by the interaction of polaritons with a reservoir of high energy excitonic…
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…
Observation of gain-pinned dissipative solitons in a microcavity laser
Maciej Pieczarka, Dario Poletti, Christian Schneider +4
We demonstrate an experimental approach to create dissipative solitons in a microcavity laser. In particular, we shape the spatial gain profile of a quasi-one-dimensional microcavi…
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…
Theory of relaxation oscillations in exciton-polariton condensates
Andrzej Opala, Maciej Pieczarka, Michał Matuszewski
We provide an analytical and numerical description of relaxation oscillations in the nonresonantly pumped polariton condensate. The presented considerations are based on the open d…
Dynamics of defect-induced dark solitons in an exciton-polariton condensate
Andrzej Opala, Maciej Pieczarka, Nataliya Bobrovska +1
We study theoretically the emission of dark solitons induced by a moving defect in a nonresonantly pumped exciton-polariton condensate. The number of created dark solitons per unit…
Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
Maciej Pieczarka, Marcin Syperek, Łukasz Dusanowski +5
Semiconductor microcavities are often influenced by structural imperfections, which can disturb the flow and dynamics of exciton-polariton condensates. Additionally, in exciton-pol…
Ghost Branch Photoluminescence From a Polariton Fluid Under Nonresonant Excitation
Maciej Pieczarka, Marcin Syperek, Łukasz Dusanowski +8
An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced inc…