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Measuring high-efficiency perfect composite vortex beams with reflective metasurfaces in microwave band.
Nanophotonics
January 2025
Departments of Optics and General Physics, Francisk Skorina Gomel State University, Sovetskaya Str. 104, Gomel 246019, Belarus.
Optical vortex beams carrying orbit angular momentum have attracted significant attention recently. Perfect vortex beams, characterized by their topological charge-independent intensity profile, have important applications in enhancing communication capacity and optimizing particle manipulation. In this paper, metal-insulator-metal copper-coin type reflective metasurfaces are proposed to generate perfect composite vortex beams in X-band.
View Article and Find Full Text PDFAbrupt lateral beam shifts from terahertz quasi-bound states in the continuum.
Sci Bull (Beijing)
January 2025
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore; Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore 639798, Singapore. Electronic address:
Bound states in the continuum (BICs) are notable in photonics for their infinite Q factors. Perturbed BICs, or quasi-BICs (QBICs), have finite but ultra-high Q factors, enabling external coupling. So far, most studies have focused on the momentum-space properties of BICs and QBICs, with few discussions on their properties in real space.
View Article and Find Full Text PDFFrom one size fits all to a tailored approach: integrating precision medicine into medical education.
BMC Med Educ
January 2025
Department of Clinical Pharmacy and Pharmacy Practice, Faculty of Pharmaceutical Sciences, The Hashemite University, P.O. Box 330127, Zarqa, 13133, Jordan.
Background: As precision medicine gains momentum, the traditional - One Size Fits All - approach to disease prevention and treatment is becoming less reliable. Medical education must prioritize equipping physicians with the knowledge to apply precision medicine effectively. The present study aimed to investigate the knowledge, attitudes, and perceived barriers to precision medicine among medical students, interns, and physicians in Jordan.
View Article and Find Full Text PDFFactors influencing evidence-based cardiovascular disease prevention programming in rural African American communities: a community-engaged concept mapping study.
Implement Sci Commun
January 2025
Center for Health Equity Research, School of Medicine, University of North Carolina at Chapel Hill, 333 South Columbia Street, MacNider Hall Ste 323, Chapel Hill, NC, 27599, USA.
Background: African Americans experience cardiovascular disease (CVD) disparities, and the burden is greatest in the rural south. Although evidence-based CVD prevention and management programs have been tailored to this context, implementation has been limited and not sustained long-term. To understand how to implement and sustain evidence-based CVD programs at scale, we must explore the perspectives of organizations serving rural African American communities and situate findings within foundational Implementation Science frameworks.
View Article and Find Full Text PDFUnravelling the nonlinear generation of designer vortices with dielectric metasurfaces.
Light Sci Appl
January 2025
Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité and CNRS, Paris, 75013, France.
Vortex beams are currently drawing a great deal of interest, from fundamental research to several promising applications. While their generation in bulky optical devices limits their use in integrated complex systems, metasurfaces have recently proven successful in creating optical vortices, especially in the linear regime. In the nonlinear domain, of strategic importance for the future of classical and quantum information, to date orbital angular momentum has only been created in qualitative ways, without discussing discrepancies between design and experimental results.
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