Optical Conductivity
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Optical Conductivity as a Stage-Sensitive Imaging Biomarker for Alzheimer's Disease
Early detection of Alzheimer's disease (AD) remains limited by the inability of current imaging biomarkers to capture dynamic tissue changes preceding overt neurodegeneration. Conventional approaches primarily reflect molecular burden or structural atrophy and incompletely characterize the intermediate microenvironmental remodeling linking early pathology to clinical progression. Here, we introduce optical conductivity as a novel imaging biomarker characterizing tissue responses to...
HADT: A Heterogeneous Multi-Agent Differential Transformer for Autonomous Earth Observation Satellite Cluster
arXiv:2605.31023v1 Announce Type: new Abstract: This work addresses the problem of autonomous resource management in heterogeneous satellite cluster conducting Earth Observation (EO) missions including optical and Synthetic Aperture Radar (SAR) satellites. In autonomous operation mode, satellites are equipped with intelligent capabilities enabling real-time decision-making based on the latest conditions, while requiring minimal interaction with ground operators. Traditional scheduling...
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.
Wave-optical formulation of the image-rotation property in Dove prisms: A Fourier-optics approach
arXiv:2606.05027v1 Announce Type: new Abstract: In this paper, we present a formula for calculating the complex amplitude of the output electric field for a given input wave that impinges on a Dove prism. We use Fourier optics to decompose the input wave into plane waves, then find the output plane waves of the Dove prism as functions of the spatial frequencies of the input components. The total output image is then obtained by integrating all the output plane waves, resulting in a final...
Dynamic terahertz wavefront control using stretchable single-walled carbon nanotube-based metasurfaces
Dynamic terahertz wavefront control using stretchable single-walled carbon nanotube-based metasurfaces Sadie Harley Scientific Editor Alexander Pol Deputy Editor The terahertz (THz) frequency regime, sitting between microwaves and infrared light, has long promised revolutionary advances in wireless communication, security imaging and nondestructive sensing. A key roadblock, however, has been the lack of compact, dynamically tunable components capable of manipulating THz beams on demand....
Light pulses uncover Higgs mode that reshapes perovskite crystal symmetry
Light pulses uncover Higgs mode that reshapes perovskite crystal symmetry Sadie Harley Scientific Editor Robert Egan Associate Editor Waves of light and sound interact to drive electronic and structural changes in a perovskite crystal. At the atomic scale, nothing is ever truly still. Materials that appear perfectly rigid and motionless to the naked eye are in fact swarms of vibrating atoms.
Emerging Non-Volatile Opto-electronic Resistive Memories for Next-Generation Photonic Integrated Circuits
arXiv:2606.01463v1 Announce Type: new Abstract: Photonic integrated circuits have emerged as a powerful platform for high speed communication, sensing, and information processing due to their large bandwidth, low latency, and inherent parallelism. However, the absence of efficient, scalable, and non-volatile memory elements remains a fundamental limitation for realizing fully programmable and adaptive photonic systems. Conventional electronic memories introduce significant energy overhead,...
Using Optical Aberrations to Distinguish Real Astronomical Transients
Astrophysics > Instrumentation and Methods for Astrophysics [Submitted on 6 Jun 2026] Title:Fast Astronomical Transients in Archival Photographic Plates: Using optical aberrations as a tool for discerning real images, from plate artifacts View PDF HTML (experimental)Abstract:The detection of fast astronomical transients in photographic plates from the Palomar sky surveys conducted in the 1950s, was subject to the criticism that such transients could be just the effect of otherwise...
DiffSight-Former: Modeling Structural Differences and Temporal Dynamics for Glaucoma Progression Prediction
Announce Type: new Abstract: Glaucoma is a leading cause of irreversible blindness worldwide, and early detection from fundus images is critical for effective disease management. While deep learning has achieved promising performance in fundus image analysis, most existing methods rely on single time-point images and fail to capture longitudinal structural and vascular changes associated with disease progression. Sequential fundus images acquired during clinical follow-up provide valuable...
Commentary: If your child’s myopia keeps getting worse, having new spectacles isn’t enough
Commentary: If your child’s myopia keeps getting worse, having new spectacles isn’t enough Slowing the progression of myopia in children early may matter far more than we realise for their lifelong eye health, says Dr Foo Li Lian. SINGAPORE: When I tell parents that their young child’s spectacle prescription has increased again within a year, they are sometimes almost too calm about it. They see it as simply “updating glasses” annually and making the child sit farther from the television or...