Publications by authors named "I Staude"
High-order harmonic generation (HHG) in solids opens new frontiers in ultrafast spectroscopy of carrier and field dynamics in condensed matter, picometer resolution structural lattice characterization and designing compact platforms for attosecond pulse sources. Nanoscale structuring of solid surfaces provides a powerful tool for controlling the spatial characteristics and efficiency of the harmonic emission. Here we study HHG in a prototypical phase-change material GeSbTe (GST).
View Article and Find Full Text PDFGallium phosphide (GaP) offers unique opportunities for nonlinear and quantum nanophotonics due to its wide optical transparency range, high second-order nonlinear susceptibility, and the possibility to tailor the nonlinear response by a suitable choice of crystal orientation. However, the availability of single crystalline thin films of GaP on low index substrates, as typically required for nonlinear dielectric metasurfaces, is limited. Here we designed and experimentally realized monolithic GaP metasurfaces for enhanced and tailored second harmonic generation (SHG).
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- The study examines how valley degrees of freedom in two-dimensional transition metal dichalcogenides, like molybdenum disulfide, could influence future electronic devices.
- Researchers investigate the interaction between valley-specific light emission and a resonant plasmonic nanosphere to understand its effects on circular polarization.
- The findings show unexpected depolarization of light, providing essential insights into light-matter interactions and paving the way for advanced valleytronic device development.
Insects decline with host plants but coextinctions may be limited.
Proc Natl Acad Sci U S A
October 2024
The loss of wild plant populations is often assumed to lead to coextinctions, particularly among specialized insects. Despite global declines in both terrestrial insects and plants, the relationship between these trends remains elusive. Here, we address this gap by analyzing the relationship between population trends of insects and their host plants in Germany, encompassing over 150,000 interactions among 3,429 plant and 2,239 insect species, including both pollinators (bees and hoverflies) and herbivores (butterflies, moths, and sawflies).
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- Climate change often leads to habitat shifts for species towards the poles, but other factors also play a significant role in determining species distribution.
- A study on European forest plants shows that they are more likely to shift westward rather than northward, with westward movements being 2.6 times more common.
- These shifts are primarily driven by nitrogen deposition and recovery from past pollution, indicating that biodiversity changes are influenced by multiple environmental factors, not just climate change alone.