61 citations · 458 across the 27 of their papers we have counts for
27 papers
Coherent dynamics of individual excitons in a quantum dot embedded in a nanopost
Maxime Gaignard, Karolina Ewa Polczynska, Niels Gregersen +5
We measured coherent ultrafast dynamics of exciton complexes in a single strongly-confined InAs quantum dot embedded in a GaAs nanopost. Such a photonic structure combines a wave g…
Controlled Coherent Coupling in a Quantum Dot Molecule Revealed by Ultrafast Four-Wave Mixing Spectroscopy
Daniel Wigger, Johannes Schall, Marielle Deconinck +18
Semiconductor quantum dot molecules are considered as promising candidates for quantum technological applications due to their wide tunability of optical properties and coverage of…
Coherent imaging and dynamics of excitons in MoSe monolayers epitaxially grown on hexagonal boron nitride
Karolina Ewa Połczyńska, Simon Le Denmat, Takashi Taniguchi +5
Using four-wave mixing microscopy, we measure the coherent response and ultrafast dynamics of excitons and trions in MoSe monolayers grown by molecular beam epitaxy on thin fil…
Controlled coherent-coupling and dynamics of exciton complexes in a MoSe monolayer
Aleksander Rodek, Thilo Hahn, James Howarth +6
Quantifying and controlling the coherent dynamics and couplings of optically active excitations in solids is of paramount importance in fundamental research in condensed matter opt…
Quantum dot molecule devices with optical control of charge status and electronic control of coupling
Frederik Bopp, Jonathan Rojas, Natalia Revenga +13
Tunnel-coupled pairs of optically active quantum dots - quantum dot molecules (QDMs) - offer the possibility to combine excellent optical properties such as strong light-matter cou…
Coherent dynamics of a single Mn-doped quantum dot revealed by four-wave mixing spectroscopy
Jacek Kasprzak, Daniel Wigger, Thilo Hahn +6
For future quantum technologies the combination of a long quantum state lifetime and an efficient interface with external optical excitation are required. In solids, the former is…
Destructive photon echo formation in six-wave mixing signals of a MoSe monolayer
Thilo Hahn, Diana Vaclavkova, Miroslav Bartos +8
Monolayers of transition metal dichalcogenides display a strong excitonic optical response. Additionally encapsulating the monolayer with hexagonal boron nitride allows to reach th…
Local field effects in ultrafast light-matter interaction measured by pump-probe spectroscopy of monolayer MoSe
Aleksander Rodek, Thilo Hahn, Jacek Kasprzak +10
Using a novel approach to ultrafast resonant pump-probe spectroscopy we investigate the spectral shape and dynamics of absorption features related to the A exciton in an hBN/MoSe$_…
Influence of local fields on the dynamics of four-wave mixing signals from 2D semiconductor systems
Thilo Hahn, Jacek Kasprzak, Paweł Machnikowski +2
In recent years the physics of two-dimensional semiconductors was revived by the discovery of the class of transition metal dichalcogenides. In these systems excitons dominate the…
Four-wave mixing dynamics of a strongly coupled quantum-dot--microcavity system driven by up to 20 photons
Daniel Groll, Daniel Wigger, Kevin Jürgens +6
The Jaynes-Cummings (JC) model represents one of the simplest ways in which single qubits can interact with single photon modes, leading to profound quantum phenomena like superpos…
Coherent dynamics and mapping of excitons in single-layer MoSe and WSe at the homogeneous limit
Caroline Boule, Diana Vaclavkova, Miroslav Bartos +6
We perform coherent nonlinear spectroscopy of excitons in single-layers of MoSe and WSe encapsulated between thin films of hexagonal boron nitride. Employing four-wave mixi…
Dynamics of resonantly excited excitons in MoSe and WS single-layers monitored with four-wave mixing
Tomasz Jakubczyk, Miroslav Bartos, Karol Nogajewski +4
We investigate dynamics of resonantly excited excitons in single-layers of MoSe and WS down to 4.5 K. To this end, we measure the delay dependence of the heterodyne four-wa…
Acoustic Phonon Sideband Dynamics During Polaron Formation in a Single Quantum Dot
Daniel Wigger, Vage Karakhanyan, Christian Schneider +5
When an electron-hole pair is optically excited in a semiconductor quantum dot the host crystal lattice needs to adapt to the presence of the generated charge distribution. Therefo…
Interlayer Charge Transfer and Defect Creation in Type I van der Waals Heterostructures
G. Nayak, S. Lisi, W-L. Liu +13
Van der Waals heterostructures give access to a wide variety of new phenomena that emerge thanks to the combination of properties brought in by the constituent layered materials. W…
Coherence and density dynamics of excitons in a single-layer MoS reaching the homogeneous limit
Tomasz Jakubczyk, Goutham Nayak, Lorenzo Scarpelli +13
We measure the coherent nonlinear response of excitons in a single-layer of molybdenum disulphide embedded in hexagonal boron nitride, forming a -BN/MoS/-BN heterostructu…
Rabi oscillations of a quantum dot exciton coupled to acoustic phonons: coherence and population readout
Daniel Wigger, Christian Schneider, Stefan Gerhardt +4
While the advanced coherent control of qubits is now routinely carried out in low frequency (GHz) systems like single spins, it is far more challenging to achieve for two-level sys…
Impact of environment on dynamics of exciton complexes in a WS monolayer
T. Jakubczyk, K. Nogajewski, M. R. Molas +4
Scientific curiosity to uncover original optical properties and functionalities of atomically thin semiconductors, stemming from unusual Coulomb interactions in the two-dimensional…
Exploring coherence of individual excitons in InAs quantum dots embedded in natural photonic defects: influence of the excitation intensity
Daniel Wigger, Valentin Delmonte, Quentin Mermillod +10
The exact optical response of quantum few-level systems depends crucially on the exact choice of the incoming pulse areas. We use four-wave mixing (FWM) spectroscopy to infer the c…
Antireflective photonic structure for coherent nonlinear spectroscopy of single magnetic quantum dots
W. Pacuski, J. -G. Rousset, V. Delmonte +6
This work presents epitaxial growth and optical spectroscopy of CdTe quantum dots (QDs) in (Cd,Zn,Mg)Te barriers placed on the top of (Cd,Zn,Mg)Te distributed Bragg reflector. The…
Coherent coupling of individual quantum dots measured with phase-referenced two-dimensional spectroscopy: photon echo versus double quantum coherence
Valentin Delmonte, Judith F. Specht, Tomasz Jakubczyk +7
We employ two-dimensional (2D) coherent, nonlinear spectroscopy to investigate couplings within individual InAs quantum dots (QD) and QD molecules. Swapping pulse ordering in a two…
Impact of phonons on dephasing of individual excitons in deterministic quantum dot microlenses
T. Jakubczyk, V. Delmonte, S. Fischbach +12
Optimized light-matter coupling in semiconductor nanostructures is a key to understand their optical properties and can be enabled by advanced fabrication techniques. Using in-situ…
Radiatively limited dephasing and exciton dynamics in MoSe monolayers
Tomasz Jakubczyk, Valentin Delmonte, Maciej Koperski +5
By implementing four-wave mixing (FWM) micro-spectroscopy we measure coherence and population dynamics of the exciton transitions in monolayers of MoSe. We reveal their dephasi…
Harvesting, coupling and control of single exciton coherences in photonic waveguide antennas
Q. Mermillod, T. Jakubczyk, V. Delmonte +5
We perform coherent non-linear spectroscopy of individual excitons strongly confined in single InAs quantum dots (QDs). The retrieval of their intrinsically weak four-wave mixing (…
Dynamics of excitons in individual InAs quantum dots revealed in four-wave mixing spectroscopy
Q. Mermillod, D. Wigger, V. Delmonte +8
A detailed understanding of the population and coherence dynamics in optically driven individual emitters in solids and their signatures in ultrafast nonlinear-optical signals is o…