A5063791238- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Perovskite Materials and Applications
- Neural Networks and Reservoir Computing
- Quantum and electron transport phenomena
- Graphene research and applications
- Strong Light-Matter Interactions
- Diamond and Carbon-based Materials Research
- Solid-state spectroscopy and crystallography
- Boron and Carbon Nanomaterials Research
- Physics of Superconductivity and Magnetism
- Machine Learning in Materials Science
- Spectroscopy and Quantum Chemical Studies
- Quantum optics and atomic interactions
Technical University of Munich
2023-2024
Schott (Germany)
2023-2024
Munich Center for Quantum Science and Technology
2023-2024
We report lasing of moiré trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe
We report on the spatial coherence of interlayer exciton ensembles as formed in MoSe2/WSe2 heterostructures and characterized by point-inversion Michelson-Morley interferometry. Below 10 K, measured length excitons reaches values equivalent to lateral expansion ensembles. In this regime, light emission turns out be homogeneously broadened energy with a high temporal coherence. At higher temperatures, both time decrease, most likely because thermal processes. The presented findings point...
Semiconductor excitons are composite particles consisting of fermionic carriers. Nevertheless they considered as paradigmatic candidates for bosonic condensation and the formation macroscopic coherence in solids. To address both effects, kinetics exciton thermalization is studied, including their character. This way, based on primary assumption a questioned. In this light, also discussed whether recently observed decrease linewidths at increasing density can be related to signature emerging...
Hexagonal boron nitride (hBN) hosts luminescent defects possessing spin qualities compatible with quantum sensing protocols at room temperature. Vacancies, in particular, are readily obtained via exposure to high-energy ion beams. While the defect creation mechanism such irradiation is well understood, occurrence rate of optically active negatively charged vacancies ($V_B^-$) an open question. In this work, we exploit focused helium ions systematically generate vacancy hBN flakes varying...
Heterostructures made from 2D transition-metal dichalcogenides are known as ideal platforms to explore excitonic phenomena ranging correlated moir\'e excitons degenerate interlayer exciton ensembles. So far, it is assumed that the atomic reconstruction appearing in some of heterostructures gives rise a dominating localization states. We demonstrate states reconstructed MoSe$_2$/WSe$_2$ can extend well beyond periodicity investigated heterostructures. The results based on real-space...
We report lasing of moir\'e trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe$_2$/WSe$_2$ heterobilayer into high-$Q$ ($>10^4$) nanophotonic cavity. control the cavity-IX detuning using magnetic field and measure their dipolar coupling strength to be $78 \pm 4\ \mathrm{\mu eV}$, fully consistent with 82 $\mathrm{\mu eV}$ predicted theory. The emission from cavity mode shows clear threshold-like behavior as transition is tuned resonance observe superlinear...
We report on the spatial coherence of interlayer exciton ensembles as formed in MoSe$_2$/WSe$_2$ heterostructures and characterized by point-inversion Michelson-Morley interferometry. Below 10 K, measured length excitons reaches values equivalent to lateral expansion ensembles. In this regime, light emission turns out be homogeneously broadened energy with a high temporal coherence. At higher temperatures, both time decrease, most likely because thermal processes. The presented findings...
The question of macroscopic occupation and spontaneous emergence coherence for exciton ensembles has gained renewed attention due to the rise van der Waals heterostructures made atomically thin semiconductors. hosted interlayer excitons exhibit nanosecond lifetimes, long enough allow excitonic thermalization in time. Several experimental studies reported signatures effects at elevated densities. With respect theory, are composite particles formed by fermionic constituents, a general...