A versatile and tunable vectorial holography is demonstrated based on single-layer single-material liquid crystal superstructures. This novel approach advances the process from scalar to vectorial holography, opening new opportunities for advanced cryptography, super‑resolution imaging, and many other tunable photonic applications.
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http://dx.doi.org/10.1038/s41377-024-01538-7 | DOI Listing |
Adv Sci (Weinh)
January 2025
National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, China.
J Electrocardiol
January 2025
Department of Cardiology, JIPMER, India. Electronic address:
Background: The Electrocardiogram (ECG) can be visualised either in a scalar form, as waves in the standard 12‑lead ECG, or vectorially, as vector loops in different planes in the Vectorcardiogram (VCG). An Electro-Vectorcardiogram (ECG-VCG) is a graphic visualization combining scalar and vector ECGs. We aimed to assess if integrating the scalar 12‑lead ECG and vector ECG makes ECG interpretation by medical students more accurate, faster, and easier than using 12‑lead ECG alone.
View Article and Find Full Text PDFACS Nano
November 2024
Department of Electrical and Computer Engineering, National University of Singapore, Kent Ridge, 117583 Republic of Singapore.
The tight-binding model, foundational in depicting electronic behaviors in solid-state physics, has recently contributed to the understanding of non-Hermitian skin effects in optics, acoustics, and mechanics. However, tight-binding model is primarily built upon scalar nearest couplings, which in turn does not fit to describe the vectorial long-range interactions inherently in thermophotonics. Here, we report a strategy involving many-body radiative interactions in a two-dimensional thermophotonic lattice, and further reveal two types of orthogonal non-Hermitian skin modes in a reciprocal system.
View Article and Find Full Text PDFSci Adv
November 2024
Center for Nano Optics, University of Southern Denmark, DK-5230 Odense M, Denmark.
Hybrid integration of solid-state quantum emitters (QEs) into nanophotonic structures opens enticing perspectives for exploiting multiple degrees of freedom of single-photon sources for on-chip quantum photonic applications. However, the state-of-the-art single-photon sources are mostly limited to two-level states or scalar vortex beams. Direct generation of high-dimensional structured single photons remains challenging, being still in its infancy.
View Article and Find Full Text PDFPhys Rev Lett
October 2024
Dipartimento di Scienza e Alta Tecnologia and Center for Nonlinear and Complex Systems, Università degli Studi dell'Insubria, Como, Italy.
Confining in space the equilibrium fluctuations of statistical systems with long-range correlations is known to result into effective forces on the boundaries. Here we demonstrate the occurrence of Casimir-like forces in the nonequilibrium context provided by flocking active matter. In particular, we consider a system of aligning self-propelled particles in two spatial dimensions that are transversally confined by reflecting or partially reflecting walls.
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