The chip-scale device could provide sensitive detection of lead levels in drinking water, whose toxicity affects 240 million people worldwide.
Juejun Hu
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Scientists develop an affordable sensor for lead contamination
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New “metalens” shifts focus without tilting or moving
The design may enable miniature zoom lenses for drones, cellphones, or night-vision goggles.
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Engineers produce a fisheye lens that’s completely flat
The single piece of glass produces crisp panoramic images.
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Inexpensive chip-based device may transform spectrometry
Tiny device could replace expensive lab-scale equipment for many applications.
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Digital Fourier Transform Spectroscopy: Juejun (JJ) Hu, MIT
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Improving mid-infrared imaging and sensing
Artificial optical materials could allow cheaper, flatter, more efficient detectors for night vision and other uses.
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Researchers develop flexible, stretchable photonic devices
Light-based devices could be used as biomedical sensors or as flexible connectors for electronics.
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Mechanically Flexible Photonic Sensors, Juejun Hu
