#Italy: #Today in #Italy: A roundup of the late https://kensbookinfo.blogspot.com/p/etc.html#Italy

#Science And #Research: #Artificial Intelligence for Optical #Metasurface De https://kensbookinfo.blogspot.com/p/24-7-pr.html#238

#Bristol #News: Hartcliffe Way crash leaves Harley-Davidson rider https://kensbookinfo.blogspot.com/p/cities.html#22a

#Agriland: Beef kill: 2025 supply now down by over 180,000 he https://kensbookinfo.blogspot.com/p/ireland.html#Agriland

#Vancouver #News: Ballfield renaming for the original owner https://kensbookinfo.blogspot.com/p/cities.html#114a

https://phys.org/news/2025-07-asymmetric-metasurface-precise-photon-entanglement.html

created by a #metasurface made of indium gallium phosphide (InGaP), which has a nonlinear response that can split a classical photon into two #quantumphotons. By tuning the wavelength of the initial photon, the two new photons can be generated as fully entangled through their polarization, not entangled at all, or any value in between, with picosecond control.

This paper-thin lens can turn infrared light into visible beams—ushering in a new optical era of ultra-compact, light-bending devices. #Nanotech #Optics #Metasurface

https://geekoo.news/new-metalens-converts-infrared-light-into-visible-vision/

Quantum holograms using polarized light and metasurfaces enable precise control over entangled holographic information.
#Metasurface #Hologram #Quantum #Optics #Science

🔗 Discover more: https://spie.org/news/holograms-with-a-twist-entangling-light-and-information#:~:text=Quantum%20holograms%20using%20polarized%20light%20and%20metasurfaces%20enable%20precise%20control%20over%20entangled%20holographic%20information%2C%20advancing%20practical%20applications%20in%20quantum%20communication%20and%20anti%2Dcounterfeiting%20technologies

Revolutionizing optics: Harvard's bilayer metasurface offers unparalleled control over light, paving the way for advanced imaging and communication technologies. #Optics #Metasurface #Photonics

https://geekoo.news/advancing-optics-the-emergence-of-bilayer-metasurfaces/

🌟 New selected research highlight 🌟

Tunable highly reflective metasurfaces – International team led by @unihannover researchers demonstrate wavelength-selective metamirrors based on sapphire and silicon nanoparticles

Metasurfaces are sheet materials with artificial structures smaller than the electromagnetic wavelength with which they interact. A new study led by researchers at the Institute for Gravitational Physics at @unihannover, Germany, presents the first experimental validation of the feasibility of realizing a reflective metasurface at selected wavelengths. The metasurface presented in this study is based on a single-layer nanoparticle array consisting of silicon cylinders on a sapphire substrate. The fabricated structures have a reflectivity of about 95% (at 1064 nm or 1550 nm), which can be improved by further optimization of the fabrication and characterization processes. This technology has the potential to be used in future gravitational-wave detectors. There, single-layer reflective surfaces mitigate coating thermal noise, an important source of instrumental disturbance.

ℹ️ https://www.aei.mpg.de/1202212/tunable-highly-reflective-metasurfaces
📄 https://onlinelibrary.wiley.com/doi/10.1002/adpr.202400116 (Open Access)

#metasurface #photonics #metamirrors #GravitationalWaveDetectors #research

🌟 Neues Forschungshighlight 🌟

Tunable highly reflective metasurfaces – International team led by @unihannover researchers demonstrate wavelength-selective metamirrors based on sapphire and silicon nanoparticles

Metasurfaces are sheet materials with artificial structures smaller than the electromagnetic wavelength with which they interact. A new study led by researchers at the Institute for Gravitational Physics at @unihannover, Germany, presents the first experimental validation of the feasibility of realizing a reflective metasurface at selected wavelengths. The metasurface presented in this study is based on a single-layer nanoparticle array consisting of silicon cylinders on a sapphire substrate. The fabricated structures have a reflectivity of about 95% (at 1064 nm or 1550 nm), which can be improved by further optimization of the fabrication and characterization processes. This technology has the potential to be used in future gravitational-wave detectors. There, single-layer reflective surfaces mitigate coating thermal noise, an important source of instrumental disturbance.

ℹ️ https://www.aei.mpg.de/1202729/tunable-highly-reflective-metasurfaces (englisch)
📄 https://onlinelibrary.wiley.com/doi/10.1002/adpr.202400116 (Open Access)

#metasurface #photonics #metamirrors #GravitationalWaveDetectors #research

#SGU #TheSkepticsGuideToTheUniverse:
The Skeptics Guide #1006 - Oct 19 2024

Interview with #Christian_Hubicki; From #TikTok: Fake #Spacestation; News Items:
#AI #Common_Sense, #Malnutrition in #Africa, Latest #Starship Launch, New #Metasurface, #Exomoon;
Who's That Noisy; Your Questions and E-mails: Myopia; #Science or Fiction

Webseite der Episode: https://www.theskepticsguide.org/podcast/sgu

Mediendatei: https://traffic.libsyn.com/secure/skepticsguide/skepticast2024-10-19.mp3