359 citations · 2.7k across the 49 of their papers we have counts for
32 papers · 1 filter
Magnetic brightening of light-like excitons in a monolayer semiconductor
A. Delhomme, T. Amit, P. Ji +4
Monolayer transition-metal dichalcogenides, such as WSe, are direct gap, multi-valley semiconductors. Long-range electron-hole exchange interactions mix the valleys, yielding d…
Robust trapping of 2D excitons in an engineered 1D potential from proximal ferroelectric domain walls
Pedro Soubelet, Yao Tong, Asier Astaburuaga Hernandez +4
We investigate the confinement of neutral excitons in a one-dimensional (1D) potential, engineered by proximizing hBN-encapsulated monolayer MoSe to ferroelectric domain walls…
Couplings between Photons and Ensemble of Emitters in a High- Cavity at Mesoscopic Excitation Levels
Chenjiang Qian, Viviana Villafañe, Pedro Soubelet +2
We investigate the coupling between an ensemble of individual emitters and multiple photons in a high- cavity at the mesoscopic excitation level. The master equation theory is u…
Polarons shape the interlayer exciton emission of MoSe/WSe heterobilayers
Pedro Soubelet, Alex Delhomme, Andreas V. Stier +1
We present time-resolved and CW optical spectroscopy studies of interlayer excitons (IXs) in 2 and 3stacked MoSe/WSe heterobilayers and obtain evidence for the stro…
Rapid spin depolarization in the layered 2D Ruddlesden Popper perovskite (BA)(MA)PbI
Michael Kempf, Philipp Moser, Maximilian Tomoscheit +8
We report temperature-dependent spectroscopy on the layered (n=4) two-dimensional (2D) Ruddlesden-Popper perovskite (BA)(MA)PbI. Helicity-resolved steady-state photoluminescence (P…
Probing Dark Excitons in Monolayer MoS by NonLinear Two-Photon Spectroscopy
Chenjiang Qian, Viviana Villafañe, Pedro Soubelet +3
We report a new dark exciton in monolayer MoS using second harmonic generation spectroscopy. Hereby, the spectrally dependent second harmonic generation intensity splits into t…
Strain control of exciton and trion spin-valley dynamics in monolayer transition metal dichalcogenides
Zhao An, Pedro Soubelet, Yaroslav Zhumagulov +10
The electron-hole exchange interaction is a fundamental mechanism that drives valley depolarization via intervalley exciton hopping in semiconductor multi-valley systems. Here, we…
Lasing of Moiré Trapped MoSe/WSe Interlayer Excitons Coupled to a Nanocavity
Chenjiang Qian, Mirco Troue, Johannes Figueiredo +8
We report lasing of moiré trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe/WSe heterobilayer into a high- () nanophotonic cavity.…
Proximity-enhanced valley Zeeman splitting at the WS/graphene interface
Paulo E. Faria Junior, Thomas Naimer, Kathleen M. McCreary +5
The valley Zeeman physics of excitons in monolayer transition metal dichalcogenides provides valuable insight into the spin and orbital degrees of freedom inherent to these materia…
Twist-dependent intra- and interlayer excitons in moire MoSe2 homobilayers
Viviana Villafañe, Malte Kremser, Ruven Hübner +7
Optoelectronic properties of van der Waals homostructures can be selectively engineered by the relative twist angle between layers. Here, we study the twist-dependent moire couplin…
Emitter-Optomechanical Interaction in Ultra-High-Q hBN Nanocavities
Chenjiang Qian, Viviana Villafañe, Martin Schalk +6
Integrating quantum emitters into nanocavities which simultaneously couple to the photonic and mechanical modes is critical for interfacing electron spins, photons and phonons in t…
Moiré straintronics: a universal platform for reconfigurable quantum materials
M. Kögl, P. Soubelet, M. Brotons-Gisbert +3
Large scale two-dimensional (2D) moiré superlattices are driving a revolution in designer quantum materials. The electronic interactions in these superlattices, strongly dependent…
Spin-defect characteristics of single sulfur vacancies in monolayer
Alexander Hötger, Tomer Amit, Julian Klein +15
Single spin defects in 2D transition-metal dichalcogenides are natural spin-photon interfaces for quantum applications. Here we report high-field magneto-photoluminescence spectros…
Coupling of MoS Excitons with Lattice Phonons and Cavity Vibrational Phonons in Hybrid Nanobeam Cavities
Chenjiang Qian, Viviana Villafañe, Marko M. Petrić +3
We report resonant Raman spectroscopy of neutral excitons X and intravalley trions X in hBN-encapsulated MoS monolayer embedded in a nanobeam cavity. By temperature tun…
Unveiling the Zero-Phonon Line of the Boron Vacancy Center by Cavity Enhanced Emission
Chenjiang Qian, Viviana Villafañe, Martin Schalk +11
Negatively charged boron vacancies () in hexagonal boron nitride (hBN) exhibit a broad emission spectrum due to strong electron-phonon coupling and Jahn-Teller mixing of ele…
Trions in MoS are quantum superpositions of intra- and intervalley spin states
Julian Klein, Matthias Florian, Alexander Hötger +10
We report magneto-photoluminescence spectroscopy of gated MoS monolayers in high magnetic fields to 28 T. At B = 0T and electron density , we observe thre…
Tuning the Optical Properties of an MoSe Monolayer Using Nanoscale Plasmonic Antennas
Marko M. Petrić, Malte Kremser, Matteo Barbone +6
Nanoplasmonic systems combined with optically-active two-dimensional materials provide intriguing opportunities to explore and control light-matter interactions at extreme sub-wave…
Nonlocal Exciton-Photon Interactions in Hybrid High-Q Beam Nanocavities with Encapsulated MoS Monolayers
Chenjiang Qian, Viviana Villafañe, Pedro Soubelet +7
Atomically thin semiconductors can be readily integrated into a wide range of nanophotonic architectures for applications in quantum photonics and novel optoelectronic devices. We…
Electrical control of orbital and vibrational interlayer coupling in bi- and trilayer 2H-MoS
Julian Klein, Jakob Wierzbowski, Pedro Soubelet +6
Manipulating electronic interlayer coupling in layered van der Waals (vdW) materials is essential for designing opto-electronic devices. Here, we control vibrational and electronic…
Charged exciton kinetics in monolayer MoSe near ferroelectric domain walls in periodically poled LiNbO
Pedro Soubelet, Julian Klein, Jakob Wierzbowski +5
Monolayers of semiconducting transition metal dichalcogenides are a strongly emergent platform for exploring quantum phenomena in condensed matter, building novel opto-electronic d…
Spontaneous valley polarization of interacting carriers in a monolayer semiconductor
Jing Li, Mateusz Goryca, Nathan P. Wilson +3
We report magneto-absorption spectroscopy of gated WSe monolayers in high magnetic fields up to 60~T. When doped with a 2D Fermi sea of mobile holes, well-resolved sequences of…
Controlling exciton many-body states by the electric-field effect in monolayer MoS
Julian Klein, Alexander Hötger, Matthias Florian +10
We report magneto-optical spectroscopy of gated monolayer MoS in high magnetic fields up to 28T and obtain new insights on the many-body interaction of neutral and charged exci…
Discrete Interactions between a few Interlayer Excitons Trapped at a MoSe-WSe Heterointerface
Malte Kremser, Mauro Brotons-Gisbert, Johannes Knörzer +7
Interlayer excitons (IXs) in hetero-bilayers of transition metal dichalcogenides (TMDs) represent an exciting emergent class of long-lived dipolar composite bosons in an atomically…
Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields
M. Goryca, J. Li, A. V. Stier +8
In semiconductor physics, many essential optoelectronic material parameters can be experimentally revealed via optical spectroscopy in sufficiently large magnetic fields. For monol…