80 citations · 216 across the 12 of their papers we have counts for
13 papers
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-…
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 $…
An electrically pumped topological polariton laser
Philipp Gagel, Oleg A. Egorov, Franciszek Dzimira +9
With a seminal work of Raghu and Haldane in 2008, concepts of topology have been successfully introduced in a wide range of optical systems, emulating specific lattice Hamiltonians…
Tracking Dark Excitons with Exciton Polaritons in Semiconductor Microcavities
Daniel Schmidt, Bernd Berger, Marius Kahlert +6
Dark excitons are of fundamental importance for a wide variety of processes in semiconductors, but are difficult to investigate using optical techniques due to their weak interacti…
Controlling the gain contribution of background emitters in few-quantum-dot microlasers
F. Gericke, M. Segnon, M. von Helversen +9
We provide experimental and theoretical insight into single-emitter lasing effects in a quantum dot (QD)-microlaser under controlled variation of background gain provided by off-re…
Exciton-Polariton Flows in Cross-Dimensional Junctions
K. Winkler, H. Flayac, S. Klembt +5
We study the nonequilibrium exciton-polariton condensation in 1D to 0D and 1D to 2D junctions by means of non-resonant spectroscopy. The shape of our potential landscape allows to…
Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard
E. Estrecho, T. Gao, S. Brodbeck +5
Diabolical points (degeneracies) can naturally occur in spectra of two-dimensional quantum systems and classical wave resonators due to simple symmetries. Geometric Berry phase is…
Impact of ex-situ rapid thermal annealing on the magneto-optical properties and the oscillator strength of In(Ga)As quantum dots
T. Braun, S. Betzold, N. Lundt +3
We discuss the influence of a rapid thermal annealing step on the magneto-optical emission properties of In(Ga)As/GaAs quantum dots. We map out a strong influence of the growth- an…
Collective state transitions of exciton-polaritons loaded into a periodic potential
K. Winkler, O. A. Egorov, I. G. Savenko +9
We study the loading of a nonequilibrium, dissipative system of composite bosons -- exciton polaritons -- into a one dimensional periodic lattice potential. Utilizing momentum reso…
Spin multistability of cavity polaritons in a magnetic field
S. S. Gavrilov, A. V. Sekretenko, N. A. Gippius +5
Spin transitions are studied theoretically and experimentally in a resonantly excited system of cavity polaritons in a magnetic field. Weak pair interactions in this boson system m…
Coherence expansion and polariton condensate formation in a semiconductor microcavity
V. V. Belykh, N. N. Sibeldin, V. D. Kulakovskii +6
The dynamics of the expansion of the first order spatial coherence g(1) for a polariton system in a high-Q GaAs microcavity was investigated on the basis of Young's double slit exp…
Multi-dimensional laser spectroscopy of exciton-polaritons with spatial light modulators
P. Mai, B. Pressl, M. Sassermann +6
We describe an experimental system that allows one to easily access the dispersion curve of exciton-polaritons in a microcavity. Our approach is based on two spatial light modulato…