Physicists can use bright, hot lasers to slow atoms down so much that they measure -459 degrees Fahrenheit.
June 22, 2020 • ~6 min
Tags: physics quantum-mechanics laser light photons molecules curious-kids curious-kids-us temperature cold atoms absolute-zero warmblood sloths
Pairing lasers with microwaves makes mind-bogglingly accurate electronic clocks – a potential boon for GPS, cell phones and radar
Researchers have made some of the most accurate clocks imaginable in recent years, but the trick is harnessing those clocks to electronics. Using lasers to tune microwaves bridges the gap.
May 22, 2020 • ~7 min
Tags: physics astronomy dark-matter gravity laser gps cell-phones microwave black-holes metrology radar power-grid atomic-clocks frequency
Harvard researchers have developed a totally new type of laser that can reach terahertz frequencies offering short-range, high-bandwidth wireless communications, very-high-resolution radar, and spectroscopy.
Tags: science-technology engineering physics electromagnetic-spectrum federico-capasso laser terahertz-frequencies tunable-terahertz-laser
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