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Astronomers shed new light on formation of mysterious fast radio bursts

The Chinese Five-hundred-meter Aperture Spherical radio Telescope (FAST). Credit: Bojun Wang, Jinchen Jiang & Qisheng Cui More than 15 years after the discovery of fast radio bursts (FRBs)—millisecond-long, deep-space cosmic explosions of electromagnetic radiation—astronomers worldwide have been combing the universe to uncover clues about how and why they form. Nearly all FRBs identified have originated

Enhanced light absorption in thin silicon photodetectors with photon-trapping structures

Photon-trapping micro- and nano-sized holes in silicon (Si) make normally incident light bend by almost 90°, making it propagate laterally along the plane and leading consequently to increased light absorption in the NIR band. Credit: Qarony, Mayet, et al., doi 10.1117/1.APN.2.5.056001. Photonic systems are quickly gaining traction in many emerging applications, including optical communications, lidar

Protecting light communication with random objects

Diagram of the scheme.  Alice sends a message to Bob while Eve tries to retrieve the message. In this scheme, the original message is only retrieved after passing through both PUFs, meaning Eve can’t get the message. Credit: University of Twente Researchers from the Complex Photonic Systems (COPS) group used two layers of random materials

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