A5064454905- Strong Light-Matter Interactions
- Plasmonic and Surface Plasmon Research
- Thermal Radiation and Cooling Technologies
- Quantum and electron transport phenomena
- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Topological Materials and Phenomena
- 2D Materials and Applications
- Semiconductor Quantum Structures and Devices
- Photonic Crystals and Applications
- Perovskite Materials and Applications
- Quantum Information and Cryptography
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Dots Synthesis And Properties
- Advanced Thermodynamics and Statistical Mechanics
- Neural Networks and Reservoir Computing
- Semiconductor Lasers and Optical Devices
- Nonlinear Photonic Systems
- Quantum Mechanics and Non-Hermitian Physics
- Advanced Fiber Laser Technologies
- Molecular Junctions and Nanostructures
- Chalcogenide Semiconductor Thin Films
- Advanced Semiconductor Detectors and Materials
- Microwave Engineering and Waveguides
- Gyrotron and Vacuum Electronics Research
University of Würzburg
2016-2025
Complexity and Topology in Quantum Matter
2021
University of Bremen
2010-2017
University of St Andrews
2017
Université Grenoble Alpes
2015-2016
Centre National de la Recherche Scientifique
2014-2016
Institut Néel
2015-2016
Université Joseph Fourier
2014
Abstract Solid-state cavity quantum electrodynamics is a rapidly advancing field, which explores the frontiers of light–matter coupling. Metal-based approaches are particular interest in this as they carry potential to squeeze optical modes spaces significantly below diffraction limit. Transition metal dichalcogenides ideally suited active material electrodynamics, interact strongly with light at ultimate monolayer Here, we implement Tamm-plasmon-polariton structure and study coupling WSe 2...
We employ electric circuit networks to study topological states of matter in non-Hermitian systems enriched by parity-time symmetry $\mathcal{P}\mathcal{T}$ and chiral anti-$\mathcal{P}\mathcal{T}$ ($\mathcal{A}\mathcal{P}\mathcal{T}$). The structure manifests itself the complex admittance bands which yields excellent measurability signal noise ratio. analyze impact $\mathcal{P}\mathcal{T}$-symmetric gain loss on localized edge defect a Su-Schrieffer-Heeger (SSH) circuit. realize all three...
Topologically locked for emission The output power from a laser system can be increased by forming an array of lasers; however, because the individual lasers are independent, resultant may not coherent. Dikopoltsev et al . report on realization topological vertical-cavity surface-emitting (VCSEL) array. nature array-based was achieved through combination in-plane propagation evanescent light linking vertical cavity features force injection locking, making all emitters (30 in this case) act...
We report lasing of moiré trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe
Strong light–matter coupling of a photon mode to tightly bound Frenkel excitons in organic materials has emerged as versatile, room-temperature platform study nonlinear many-particle physics and bosonic condensation. However, various aspects the optical response this regime remained largely unexplored. Here, hemispheric cavity filled with fluorescent protein mCherry is utilized address two important questions. First, combining high quality factor microcavity well-defined structure allows...
Topological concepts have been applied to a wide range of fields in order successfully describe the emergence robust edge modes that are unaffected by scattering or disorder. In photonics, indications lasing from topologically protected with improved overall laser characteristics were observed. Here, we study exciton-polariton microcavity traps arranged one-dimensional Su–Schrieffer–Heeger lattice and form topological defect mode which unequivocally observe highly coherent polariton lasing....
Interacting bosonic particles in artificial lattices have proven to be a powerful tool for the investigation of exotic phases matter as well phenomena resulting from non-trivial topology. Exciton-polaritons, quasi-particles light and matter, shown combine on-chip benefits optical systems with strong interactions, inherited form their character. Technologically significant semiconductor platforms, however, strictly require cryogenic temperatures operability. In this paper, we demonstrate...
The emergence of spatial and temporal coherence light emitted from solid-state systems is a fundamental phenomenon, rooting in plethora microscopic processes. It intrinsically aligned with the control light-matter coupling, canonical for laser oscillation. However, it also emerges superradiance multiple, phase-locked emitters, more recently, long-range order have been investigated bosonic condensates thermalized light, as well exciton-polaritons driven to ground state via stimulated...
Abstract Solid-state quantum emitters with manipulable spin-qubits are promising platforms for communication applications. Although such light-matter interfaces could be realized in many systems only a few allow light emission the telecom bands necessary long-distance networks. Here, we propose and implement an optically active solid-state spin-qubit based on hole confined single InAs/GaAs dot grown InGaAs metamorphic buffer layer emitting photons C-band. We lift spin-degeneracy using...
The rotational response of quantum condensed fluids is strikingly distinct from rotating classical fluids, especially notable for the excitation and ordering quantized vortex ensembles. Although widely studied in conservative systems, dynamics open-dissipative superfluids such as exciton-polariton condensates remains largely unexplored, it requires high-frequency rotation while avoiding resonantly driving condensate. We create a polariton condensate at gigahertz frequencies by off-resonantly...
We study the condensation of exciton-polaritons in a two-dimensional Lieb lattice micropillars. show selective polariton into flatbands formed by S and Px,y orbital modes micropillars under non-resonant laser excitation. The real space mode patterns these condensates are accurately reproduced calculation related Bloch S- P-flatbands. Our work emphasizes potential exciton-polariton lattices emulating Hamiltonians advanced landscapes. Furthermore, obtained results provide deeper insight...
Exceptional points are degeneracies in the spectrum of non-Hermitian open systems where at least two eigenfrequencies and simultaneously corresponding eigenstates Hamiltonian coalesce. Especially, robust construction higher-order exceptional with more than degenerate is challenging but yet worthwhile for applications. In this paper, we reconsider formation through waveguide-coupled microring cavities asymmetric backscattering. context, demonstrate influence perturbations on frequency...
Using angle-resolved Raman spectroscopy, we show that a resonantly excited ground-state exciton-polariton fluid behaves like nonequilibrium coolant for its host solid-state semiconductor microcavity. With this optical technique, obtain detailed measurement of the thermal fluxes generated by pumped polaritons. We thus find maximum cooling power cryostat temperature 50 K and below where is usually suppressed, identify participation an ultrafast mechanism. also character polaritons constitutes...
Two-dimensional electronic materials such as graphene and transition metal dichalgenides feature unique electrical optical properties due to the conspirative effect of band structure, orbital coupling, crystal symmetry. Synthetic matter, accomplished by artificial lattice arrangements cold atoms, molecules, electron patterning, cavities, has emerged provide manifold intriguing frameworks likewise realize scenarios. Exciton polaritons have recently been added list promising candidates for...
In this Rapid Communication, we address the chiral properties of valley exciton-polaritons in a monolayer $\mathrm{W}{\mathrm{S}}_{2}$ regime strong light-matter coupling with Tamm-plasmon resonance. We observe that effect polarization, which manifests circular polarization emitted photoluminescence as sample is driven by circularly polarized laser, strongly enhanced comparison to bare monolayers and can even be observed under nonresonant excitation at ambient conditions. order explain more...
Transition metal dichalcogenides represent an ideal testbed to study excitonic effects, spin-related phenomena and fundamental light-matter coupling in nanoscopic condensed matter systems. In particular, the valley degree of freedom, which is unique such direct band gap monolayers with broken inversion symmetry, adds interest these materials. Here, we implement a Tamm-plasmon structure embedded MoSe2 monolayer formation polaritonic quasi-particles. Strong conditions between Tamm-mode trion...
Bosonic condensation belongs to the most intriguing phenomena in physics, and was mostly reserved for experiments with ultra-cold quantum gases. More recently, it became accessible exciton-based solid-state systems at elevated temperatures. Here, we demonstrate bosonic driven by excitons hosted an atomically thin layer of MoSe2, strongly coupled light a resonator. The structure is operated regime collective strong coupling between Tamm-plasmon resonance, GaAs well excitons, two-dimensional...
Interacting Bosons, loaded in artificial lattices, have emerged as a modern platform to explore collective manybody phenomena, quantum phase transitions and exotic phases of matter well enable advanced on chip simulators. Such experiments strongly rely well-defined shaping the potential landscape respectively Bosonic quasi-particles, been restricted cryogenic, or even ultra-cold temperatures. On chip, GaAs-based exciton-polariton promising system implement study bosonic non-linear systems...
Engineering the properties of quantum materials via strong light-matter coupling is a compelling research direction with multiplicity modern applications. Those range from modifying charge transport in organic molecules, steering particle correlation and interactions, even controlling chemical reactions. Here, we study modification material demonstrate an effective inversion excitonic band-ordering monolayer WSe2 spin-forbidden, optically dark ground state. In our experiments, harness...
Abstract Perylene bisimides (PBIs) are organic dyes with photoluminescence quantum yields (PLQY) close to unity in solution and great thermal photo‐chemical stability. These features alongside the tunability of their solid‐state packing arrangement via chemical functionalization make this material class an excellent candidate for exciton‐polariton lasing at room temperature. Polariton is well understood III–V semiconductors cryogenic temperatures, however, search emitter materials robust...
Abstract Two‐dimensional (2D) organic–inorganic hybrid perovskites emerged as a versatile platform for light‐emitting and photovoltaic applications due to their unique structural design chemical flexibility. Their properties depend heavily on the choice of inorganic lead halide framework surrounding organic layers. Recently, introduction chiral cations into 2D has attracted major interest induce chirality tune chiro‐optical response. Importantly, optical are dominated by tightly bound...