217 citations · 700 across the 14 of their papers we have counts for
14 papers
Exciton-phonon-scattering: A competition between bosonic and fermionic nature of bound electron-hole pairs
Manuel Katzer, Malte Selig, Lukas Sigl +7
The question of macroscopic occupation and spontaneous emergence of coherence for exciton ensembles has gained renewed attention due to the rise of van der Waals heterostructures m…
Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS
Florian Sigger, Ines Amersdorffer, Alexander Hötger +12
We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS generated by helium ion bombardment. We achieve hyperspectral i…
Spectroscopic imaging ellipsometry of two-dimensional TMDC heterostructures
Florian Sigger, Hendrik Lambers, Nisi Katharina +4
Semiconducting two-dimensional materials and their heterostructures gained a lot of interest for applications as well as fundamental studies due to their rich optical properties. A…
Optical dipole orientation of interlayer excitons in MoSe-WSe heterostacks
Lukas Sigl, Mirco Troue, Manuel Katzer +10
We report on the far-field photoluminescence intensity distribution of interlayer excitons in MoSe-WSe heterostacks as measured by back focal plane imaging in the tempe…
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…
Photo-physics and electronic structure of lateral graphene/MoS2 and metal/MoS2 junctions
Shruti Subramanian, Quinn T. Campbell, Simon Moser +18
Integration of semiconducting transition metal dichalcogenides (TMDs) into functional optoelectronic circuitries requires an understanding of the charge transfer across the interfa…
Condensation signatures of photogenerated interlayer excitons in a van der Waals heterostack
Lukas Sigl, Florian Sigger, Fabian Kronowetter +7
Atomistic van der Waals heterostacks are ideal systems for high-temperature exciton condensation because of large exciton binding energies and long lifetimes. Charge transport and…
Control of the orbital character of indirect excitons in MoS2/WS2 heterobilayers
Jonas Kiemle, Florian Sigger, Michael Lorke +5
Valley selective hybridization and residual coupling of electronic states in commensurate van der Waals heterobilayers enable the control of the orbital character of interlayer exc…
Impact of intrinsic and extrinsic imperfections on the electronic and optical properties of MoS2
J. Klein, A. Kerelsky, M. Lorke +11
Intrinsic and extrinsic disorder from lattice imperfections, substrate and environment has a strong effect on the local electronic structure and hence the optical properties of ato…
Atomistic defect states as quantum emitters in monolayer MoS
Julian Klein, Michael Lorke, Matthias Florian +12
Quantum light sources in solid-state systems are of major interest as a basic ingredient for integrated quantum device technologies. The ability to tailor quantum emission through…
Hybridized indirect excitons in MoS2/WS2 heterobilayers
Jonas Kiemle, Florian Sigger, Michael Lorke +5
Ensembles of indirect or interlayer excitons (IXs) are intriguing systems to explore classical and quantum phases of interacting bosonic ensembles. IXs are composite bosons that fe…
Photo-induced anomalous Hall effect in the type-II Weyl-semimetal WTe2 at room-temperature
Paul Seifert, Florian Sigger, Jonas Kiemle +5
Using Hall photovoltage measurements, we demonstrate that an anomalous Hall-voltage can be induced in few layer WTe2 under circularly polarized light illumination. By applying a bi…
Robust valley polarization of helium ion modified atomically thin MoS
Julian Klein, Agnieszka Kuc, Anna Nolinder +8
Atomically thin semiconductors have dimensions that are commensurate with critical feature sizes of future optoelectronic devices defined using electron/ion beam lithography. Robus…
Direct exciton emission from atomically thin transition metal dichalcogenide heterostructures near the lifetime limit
Jakob Wierzbowski, Julian Klein, Florian Sigger +9
We demonstrate the reduction of the inhomogeneous linewidth of the free excitons in atomically thin transition metal dichalcogenides (TMDCs) MoSe, WSe and MoS by…