Color-sorting metalenses boost imaging sensitivity

Researchers have shown that newly designed pixel-scale metasurface lenses—flat surfaces that use nanostructures to manipulate light—can be used to make imaging sensors that are roughly three times more sensitive than ...

Smart pill bottle keeps drugs safe

Low-cost, stretchy sensors can be assembled inside the lid of a drug container to help monitor patient safety.

Ultrathin digital camera inspired by Xenos peckii eyes

The visual system of Xenos peckii, an endoparasite of paper wasps, demonstrates distinct benefits for high sensitivity and high resolution, differing from the compound eyes of most insects. Inspired by their unique features, ...

Glow-in-the-dark paper as a rapid test for infectious diseases

Researchers from Eindhoven University of Technology (The Netherlands) and Keio University (Japan) have presented a practicable and reliable way to test for infectious diseases in Angewandte Chemie. The simple technique uses ...

How ambient energy could power the Internet of things

In the modern world, we are increasingly surrounded by digital sensors, cameras and communications devices sending data cloud-based analysis services. Those devices need power, and designers are finding new ways to draw it ...

High-tech and low-cost solutions to handle urban waste

Low-cost interventions, big data analysis and new regulations on landfills are key factors for the smart management of waste in cities. There are several ongoing studies and trials underway across Europe, with both researchers ...

Engineering team invents a camera that powers itself

A research team led by Shree K. Nayar, T.C. Chang Professor of Computer Science at Columbia Engineering, has invented a prototype video camera that is the first to be fully self-powered—it can produce an image each second, ...

Mathematically correcting over- and underexposure in photographs

Almost anyone with a camera or smartphone is sure to have noticed that taking pictures in bright conditions, such as a sunny day, can cause a loss of highlight details (or overexposure) in bright regions and a loss of shadow ...

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