411 citations · 1.6k across the 17 of their papers we have counts for
12 papers · 1 filter
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…
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…
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…
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…
Scalable single-photon sources in atomically thin MoS2
Julian Klein, Lukas Sigl, Samuel Gyger +13
Real-world quantum applications, eg. on-chip quantum networks and quantum cryptography, necessitate large scale integrated single-photon sources with nanoscale footprint for modern…
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…
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…
Electric-field switchable second-harmonic generation in bilayer MoS by inversion symmetry breaking
Julian Klein, Jakob Wierzbowski, Alexander Steinhoff +8
We demonstrate pronounced electric-field-induced second-harmonic generation in naturally inversion symmetric 2H stacked bilayer MoS embedded into microcapacitor devices. By a…
Stark effect spectroscopy of mono- and few-layer MoS
Julian Klein, Jakob Wierzbowski, Armin Regler +5
We demonstrate electrical control of the A-exciton interband transition in mono- and few-layer crystals embedded into photocapacitor devices via the DC Stark effect. Elec…
Photoluminescence and Raman investigation of stability of InSe and GaSe thin films
O. Del Pozo-Zamudio, S. Schwarz, J. Klein +10
Layered III-chalcogenide compounds belong to a variety of layered crystals that can be implemented in van der Waals heterostructures. Here we report an optical study of the stabili…