284 citations · 2.6k across the 32 of their papers we have counts for
22 papers · 1 filter
Engineering 2D material exciton lineshape with graphene/h-BN encapsulation
Steffi Y. Woo, Fuhui Shao, Ashish Arora +20
Control over the optical properties of atomically thin two-dimensional (2D) layers, including those of transition metal dichalcogenides (TMDs), is needed for future optoelectronic…
Pressure dependence of intra- and interlayer excitons in 2H-MoS bilayers
Paul Steeger, Jan-Hauke Graalmann, Robert Schmidt +7
The optical and electronic properties of multilayer transition metal dichalcogenides differ significantly from their monolayer counterparts due to interlayer interactions. The sepa…
Excitonic Absorption Signatures of Twisted Bilayer WSe by Electron Energy-Loss Spectroscopy
Steffi Y. Woo, Alberto Zobelli, Robert Schneider +7
Moiré twist angle underpins the interlayer interaction of excitons in twisted van der Waals hetero- and homo-structures. The influence of twist angle on the excitonic absorption of…
Resonant and phonon-assisted ultrafast coherent control of a single hBN color center
Johann A. Preuß, Daniel Groll, Robert Schmidt +6
Single-photon emitters in solid-state systems are important building blocks for scalable quantum technologies. Recently, quantum light emitters have been discovered in the wide-gap…
High-performance broadband Faraday rotation spectroscopy of 2D materials and thin magnetic films
Benjamin Carey, Nils Kolja Wessling, Paul Steeger +8
We present a Faraday rotation spectroscopy (FRS) technique for measurements on the micron scale. Spectral acquisition speeds of many orders of magnitude faster than state-of-the-ar…
Substrate influence on transition metal dichalcogenide monolayer exciton absorption linewidth broadening
Fuhui Shao, Steffi Y. Woo, Nianjheng Wu +13
The excitonic states of transition metal dichacolgenide (TMD) monolayers are heavily influenced by their external dielectric environment based on the substrate used. In this work,…
Dispersionless propagation of ultra-short spin-wave pulses in ultrathin yttrium iron garnet waveguides
B. Divinskiy, H. Merbouche, K. O. Nikolaev +10
We study experimentally the propagation of nanosecond spin-wave pulses in microscopic waveguides made of nanometer-thick yttrium iron garnet films. For these studies, we use micro-…
Theory of the Coherent Response of Magneto-Excitons and Magneto-Biexcitons in Monolayer Transition Metal Dichalcogenides
Florian Katsch, Dominik Christiansen, Robert Schmidt +4
The recent accessibility of high quality, charge neutral monolayer transition metal dichalcogenides with narrow exciton linewidths at the homogeneous limit provides an ideal platfo…
Strain-dependent exciton diffusion in transition metal dichalcogenides
Roberto Rosati, Samuel Brem, Raül Perea-Causín +5
Monolayers of transition metal dichalcogenides (TMDs) have a remarkable excitonic landscape with deeply bound bright and dark exciton states. Their properties are strongly affected…
Dark trions govern the temperature-dependent optical absorption and emission of doped atomically thin semiconductors
Ashish Arora, Nils Kolja Wessling, Thorsten Deilmann +7
We perform absorption and photoluminescence spectroscopy of trions in hBN-encapsulated WSe, WS, MoSe, and MoS monolayers, depending on temperature. The different tr…
Ultrafast dynamics in monolayer TMDCs: the interplay of dark excitons, phonons and intervalley Coulomb exchange
Malte Selig, Florian Katsch, Robert Schmidt +4
Understanding the ultrafast coupling and relaxation mechanisms between valleys in transition metal dichalcogenide semiconductors is of crucial interest for future valleytronic devi…
Phonon-assisted emission and absorption of individual color centers in hexagonal boron nitride
Daniel Wigger, Robert Schmidt, Osvaldo Del Pozo-Zamudio +10
Defect centers in hexagonal boron nitride represent room-temperature single-photon sources in a layered van der Waals material. These light emitters appear with a wide range of tra…
Electroluminescence from multi-particle exciton complexes in transition metal dichalcogenide semiconductors
Matthias Paur, Aday J. Molina-Mendoza, Rudolf Bratschitsch +3
Light emission from higher-order correlated excitonic states has been recently reported in hBN-encapsulated monolayer WSe2 and WS2 upon optical excitation. These exciton complexes…
Zeeman spectroscopy of excitons and hybridization of electronic states in few-layer WSe, MoSe and MoTe
Ashish Arora, Maciej Koperski, Artur Slobodeniuk +7
Monolayers and multilayers of semiconducting transition metal dichalcogenides (TMDCs) offer an ideal platform to explore valley-selective physics with promising applications in val…
Phonon Sidebands in Transition Metal Dichalcogenides
Dominik Christiansen, Malte Selig, Gunnar Berghäuser +8
Excitons dominate the optical properties of monolayer transition metal dichalcogenides (TMDs). Besides optically accessible bright exciton states, TMDs exhibit also a multitude of…
Valley Dynamics of Excitons in Monolayer Dichalcogenides
Gerd Plechinger, Philipp Nagler, Ashish Arora +6
Monolayer transition-metal dichalcogenides (TMDCs) have recently emerged as possible candidates for valleytronic applications, as the spin and valley pseudospin are directly couple…
Dark and bright exciton formation, thermalization, and photoluminescence in monolayer transition metal dichalcogenides
Malte Selig, Gunnar Berghäuser, Marten Richter +3
The remarkably strong Coulomb interaction in atomically thin transition metal dichalcogenides (TMDs) results in an extraordinarily rich many-particle physics including the formatio…
Biaxial strain tuning of the optical properties of single-layer transition metal dichalcogenides
Riccardo Frisenda, Matthias Drüppel, Robert Schmidt +5
Since their discovery single-layer semiconducting transition metal dichalcogenides have attracted much attention thanks to their outstanding optical and mechanical properties. Stra…
Micro-reflectance and transmittance spectroscopy: a versatile and powerful tool to characterize 2D materials
Riccardo Frisenda, Yue Niu, Patricia Gant +9
Optical spectroscopy techniques such as differential reflectance and transmittance have proven to be very powerful techniques to study 2D materials. However, a thorough description…
Excitonic valley effects in monolayer WS under high magnetic fields
Gerd Plechinger, Philipp Nagler, Ashish Arora +10
Transition-metal dichalcogenides can be easily produced as atomically thin sheets, exhibiting the possibility to optically polarize and read out the valley pseudospin of extremely…
Enhanced Visibility of MoS2, MoSe2, WSe2 and Black Phosphorus: Making Optical Identification of 2D Semiconductors Easier
Gabino Rubio-Bollinger, Ruben Guerrero, David Perez de Lara +5
We explore the use of Si3N4/Si substrates as a substitute of the standard SiO2/Si substrates employed nowadays to fabricate nanodevices based on 2D materials. We systematically stu…
Photovoltaic and photothermoelectric effect in a double-gated WSe2 device
Dirk J. Groenendijk, Michele Buscema, Gary A. Steele +4
Tungsten diselenide (WSe2), a semiconducting transition metal dichalcogenide (TMDC), shows great potential as active material in optoelectronic devices due to its ambipolarity and…