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Physics
Twisted Light: A new metasurface offers a compact solution for circularly polarized light
Generation of circularly polarized nonlinear signals from rotationally symmetric chiral metasurfaces under arbitrary polarization excitation. Credit: SUTD Left and right circularly polarized light, in which electromagnetic waves spiral clockwise and counterclockwise, plays an important role in a wide range of applications, from enhancing medical imaging technology to enabling advanced communication technologies. However, generating circularly polarized light often requires complex and…
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Space & Cosmos
NASA to test radiation-tolerant computing solution in space
The Radiation Tolerant Computer (RadPC) payload undergoes final inspection at Montana State University in Bozeman, which is leading the payload project. RadPC is one of the next 10 NASA payloads scheduled for delivery for NASA’s Commercial Lunar Payload Services (CLPS) initiative in 2025. The RadPC prototype has previously been tested on the International Space Station and Earth-orbiting satellites, and the…
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Science
Reed beds provide an environmentally friendly solution to sludge pollution management
Graphical summary. Credit: Soil and Environmental Health (2024). DOI: 10.1016/j.seh.2024.100083 Sludge, a byproduct of wastewater treatment, often contains hazardous substances such as heavy metals and excess nutrients, posing serious risks to the environment and health if not properly treated. Traditional processing methods rely heavily on chemicals and energy-intensive processes, making them less sustainable. Sludge treatment reed beds (STRBs) provide a…
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Space & Cosmos
Black hole research questions Kerr solution assumptions
Left: A concrete realization of the Meisner-Sharp mass of Eq. (18) and parameters 𝑀0=10, ℓ=1, 𝑣𝑖=−20, 𝑣𝑓=1000, 𝑠1=1, 𝑠2=1/40. The radius of the outgoing shell is initially set to 𝑅(𝑣=30)=5. Right: As an illustrative example, the Meisner-sharp mass in the interior region of the output shell 𝑀+(𝑣,𝑅(𝑣)) 𝑚(𝑣)=−𝛽(1+𝜀cos(𝜔𝑣 ) )/𝑣)/𝑣𝑝 is 𝛽=1, 𝜔=1, 𝑝=2, 𝜀=0 (green solid line) or 𝜀=1…
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Physics
Image-guided computational holographic wavefront shaping: a fast and versatile solution to complex imaging challenges
Microscopic images of cells using a conventional light microscope (left) and images processed using a new technology (right). Credit: Omri Haim and Jeremy Boger-Lombard A study published in Nature Photonics by researchers at the Hebrew University of Jerusalem’s Institute of Applied Physics introduces a new method for non-invasive high-resolution imaging using highly scattering media. The team, led by Professor Ori…
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