You’re undoubtedly familiar with the clip-on blood oxygen sensor and meter that uses a pair of LEDs and a photosensor. This non-intrusive transmissive-light device—which took decades to develop, ...

THE DESIRE TO DETECT ever fewer photons and ions, including some at great distances from Earth, pushes the frontiers of analytical capability. A symposium at Pittcon in Chicago earlier this month ...

Scientists have shown that terahertz rays can be converted to light visible to the human eye. The finding is a breakthrough for functional materials research and could lead to the development of a new ...