390 citations · 5.4k across the 118 of their papers we have counts for
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Thickness Insensitive Nanocavities for 2D Heterostructures using Photonic Molecules
Peirui Ji, Chenjiang Qian, Jonathan J. Finley +1
Two-dimensional (2D) heterostructures integrated into nanophotonic cavities have emerged as a promising approach towards novel photonic and opto-electronic devices. However, the th…
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…
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…
Magnetic tuning of the tunnel coupling in an optically active quantum dot molecule
Frederik Bopp, Charlotte Cullip, Christopher Thalacker +15
Self-assembled optically active quantum dot molecules (QDMs) allow the creation of protected qubits via singlet-triplet spin states. The qubit energy splitting of these states is d…
Nonlinear Dispersion Relation and Out-of-Plane Second Harmonic Generation in MoSSe and WSSe Janus Monolayers
Marko M. Petrić, Viviana Villafañe, Paul Herrmann +9
Janus transition metal dichalcogenides are an emerging class of atomically thin materials with engineered broken mirror symmetry that gives rise to long-lived dipolar excitons, Ras…
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.…
Coherent driving of direct and indirect excitons in a quantum dot molecule
Frederik Bopp, Johannes Schall, Nikolai Bart +13
Quantum dot molecules (QDMs) are one of the few quantum light sources that promise deterministic generation of one- and two-dimensional photonic graph states. The proposed protocol…
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…
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…
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…
The dependence of timing jitter of superconducting nanowire single-photon detectors on the multi-layer sample design and slew rate
R. Flaschmann, L. Zugliani, C. Schmid +6
We investigated the timing jitter of superconducting nanowire single-photon detectors (SNSPDs) and found a strong dependence on the detector response. By varying the multi-layer st…
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…
Plasmonics enabled atomically thin linearly polarized emitter at room temperature
Bidisha Roy, Maex Blauth, Siddharth Dhomkar +3
Two-dimensional transition metal di-chalcogenide semiconductors provide unique possibilities to investigate strongly confined excitonic physics and a plasmonic platform integrable…
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…
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…
Automated, deep reactive ion etching free fiber coupling to nanophotonic devices
Fabian Flassig, Rasmus Flaschmann, Thomas Kainz +6
Rapid development in integrated optoelectronic devices and quantum photonic architectures creates a need for optical fiber to chip coupling with low losses. Here we present a fast…
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…
Resonance fluorescence spectral dynamics of an acoustically modulated quantum dot
Daniel Wigger, Matthias Weiß, Michelle Lienhart +5
Quantum technologies that rely on photonic qubits require a precise controllability of their properties. For this purpose hybrid approaches are particularly attractive because they…
Self-induced ultrafast electron-hole plasma temperature oscillations in nanowire lasers
Andreas Thurn, Jochen Bissinger, Stefan Meinecke +6
Nanowire lasers can be monolithically and site-selectively integrated onto silicon photonic circuits. To assess their full potential for ultrafast opto-electronic devices, a detail…
Stimulated generation of indistinguishable single photons from a quantum ladder system
Friedrich Sbresny, Lukas Hanschke, Eva Schöll +7
We propose a scheme for the generation of highly indistinguishable single photons using semiconductor quantum dots and demonstrate its performance and potential. The scheme is base…
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…