Surface Excitations
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Related Articles from SNS
Surface Excitations, Energy Loss, and Decoherence in Electron Interferometry
Announce Type: new Abstract: We develop a mode-resolved description of decoherence in split-beam electron interferometry near dielectric surfaces, and show how it connects to models from electron energy-loss spectroscopy (EELS). The central result is that the decoherence rate is a weighted integral over the differential EELS spectrum, with a factor $1-\cos(k_x d)$ encoding the path distinguishability of the two electron trajectories. Incorporating retardation and thermal occupation...
Static Electric Fields as a Model for Hydrogen-Bond-Induced Dissociation of HF and HCl
arXiv:2606.09011v1 Announce Type: new Abstract: The influence of static electric fields on the electronic structure and dissociation behavior of the polar diatomics \ce{HF} and \ce{HCl} is investigated using quantum chemical calculations. Ground- and excited-state potential energy surfaces (PESs) are computed as a function of bond distance and external electric field strength to examine field-induced modifications of chemical bonding. The calculations reveal pronounced bond softening and...
Light-induced quantum friction of carbon nanotubes in water
Abstract Friction slows down moving objects at both macroscopic and microscopic scales1. At the electronic level, quantum friction describes direct transfer of momentum between a liquid and the electrons of a solid2. Owing to its microscopic nature, this phenomenon remains experimentally challenging to capture3.
Spatially Uniform and Defect-Tolerant Plasmonic Responses in 3D printed Gold Nanoparticle Assemblies
new Abstract: Three-dimensional (3D) assemblies of gold nanoparticles (AuNPs) offer a rich platform for plasmonic coupling and near-field engineering, yet their optical behavior is often complex due to structural disorder and fabrication-induced variability. Here, we present a systematic optical investigation of large-scale 3D AuNP assemblies fabricated via meniscus-guided assembly, focusing on the reproducibility and spatial uniformity. Spatially-resolved dark-field scattering measurements...
Plane-Wave Excitation of Multi-Beam Modulated Metasurface Antennas
arXiv:2606.02222v1 Announce Type: new Abstract: This paper explores the design of multibeam metasurface (MTS) antennas excited by multi-directional plane-wave launchers. First, we solve the fundamental yet open problem of a plane surface wave (SW) that propagates obliquely to the modulation direction of a sinusoidally modulated MTS. Closed-form expressions are provided to accurately predict the beam pointing angles for any propagation direction of the illuminating plane SW and for any...
Chosen one Manav Suthar gives India hope with dip, revs and perfect 'tappa'
TimesofIndia.com in Mullanpur: "Kya kamaal gend nikalti hai iske haath se" (There is magic in his hands every time the ball leaves them). This is the unanimous observation about Manav Suthar from everyone who has seen him up close, be it teammates, coaches, selectors or even India's current Test skipper Shubman Gill. "In one of the U-23 games, one of the close-in fielders told me that you can hear the sound of the revs when he bowls.
The Blue Moon rises tonight: Where and when to see the second full moon of May
The Blue Moon rises tonight: Where and when to see the second full moon of May The second full moon of May takes to the night sky tonight. Here's what to expect. A rare "Blue Moon" takes to the eastern sky at sunset tonight!
Rovers, regolith, robots: The blueprint for the moon
Rovers, regolith, robots: The blueprint for the moon Lisa Lock Scientific Editor Robert Egan Associate Editor The "soil" blanketing the moon's surface isn't actually soil. It's a fine, lethal, abrasive powder of shattered rock and jagged glass that shreds gaskets, chews through seals, and hangs in an airless environment blasted by unfiltered radiation and temperature swings that can warp steel. Scientists call it lunar regolith.
Serena making comeback to professional tennis
Serena Williams is officially making her comeback to professional tennis. Williams, 44, first teased her return on Monday morning with a social media video from longtime sponsor Nike. In the 17-second clip, Williams can be seen on the tennis court walking over to her buzzing phone while text reading "Guess everybody heard the news" is then shown.
Vibrations Drive Ultrafast Intersystem Crossing of a Photoexcited Cr(III) Complex
arXiv:2606.02917v1 Announce Type: new Abstract: The Cr(III) coordination complex serves as an archetypical 3d transition metal system for probing ultrafast excited-state dynamics with spin conversion due to its intrinsic intersystem crossing (ISC) pathway, $^{4}T_{2g} \rightarrow ^{2}E_{g}$, upon photoexcitation. Here we conduct ab initio molecular dynamics simulations in the $^{4}T_{2g}$ state of a model Cr(III) coordination complex, followed by analyses of multireference electronic...