NTU researchers predict that a new kind of quantum jump in atoms, called a toroidal transition, can lead to unexpected forms of light emission.
‘Donut Transitions’ Give a New Way For Atoms to Radiate
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Tiny Kinks in Light Make An Optical Ruler
Two scientists at Nanyang Technological University, Singapore, have demonstrated a new way to use near-infrared laser light to measure distances of a nanometer (one billionth of a meter), the shortest distance ever measured using a direct optical method.