Publications by authors named "P Schall"

Carrier multiplication (CM), where a single high-energy photon generates multiple electron-hole pairs, offers a promising route to enhance the efficiency of solar cells and photodetectors.Transition metal dichalcogenides, such as 2H-MoTe and 2H-WSe, exhibit efficient CM. Given the similar electronic band structure of 2H-MoSe, it is expected to show comparable CM efficiency.

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Microscopic dielectric structures can leverage geometry and photophysics to confine light, acting as microresonators. However, the use of light to reversibly manipulate the spectral pattern of photonic resonances on ultrafast time scales has hardly been explored. Here, we use femtosecond light pulses to drive reversible changes in the photonic resonances of optical microresonators over a broad spectral range.

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Dense plasmon lattices are promising as experimentally accessible implementations of seminal tight-binding Hamiltonians, but the plasmonic dispersion of interest lies far beyond the light line and is thereby inaccessible in far-field optical experiments. In this work, we make the guided mode dispersion of dense hexagonal plasmon antenna lattices visible by bandfolding induced by perturbative scatterer size modulations that introduce supercell periodicity. We present fluorescence enhancement experiments and reciprocity-based T-matrix simulations for a systematic variation of perturbation strength.

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Temperate mixed forests are currently experiencing severe drought conditions and face increased risk of degradation. However, it remains unclear how critical tree physiological functions such as sap flow density (SFD) and tree water deficit (TWD, defined as reversible stem shrinkage when water is depleted), respond to extreme environmental conditions and how they interact under dry conditions. We monitored SFD and TWD of three co-occurring European tree species (Fagus sylvatica, Fraxinus excelsior and Acer pseudoplatanus) in dry conditions, using high temporal resolution sap flow, dendrometer, and environmental measurements.

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Article Synopsis
  • The study examines the impact of mitochondrial sequences found in the nuclear genome (Numts) on analyzing mitochondrial variation in dogs, which can lead to misleading results in disease research.
  • Researchers conducted a comprehensive assessment of Numt content across various dog genomes and found 321 Numts present in a widely used genome assembly, with some dating back over 10 million years and shared with other carnivores.
  • The findings aim to provide clarity on the confounding effects of Numts in genetic studies and offer a resource to better analyze mitochondrial genetic variations in canines.
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