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Researchers from Massachusetts Institute of Technology (MIT), Harvard University, and the U.S. Army have built a compact device able to produce a terahertz laser that can be tuned over a wide range.
The device was built with commercial off-the-shelf parts and is designed to generate terahertz waves by spinning up the energy of molecules in nitrous oxide, more commonly known as laughing gas. With new information gained from novel computational techniques, the researchers were able to create a tunable terahertz laser
“These gas lasers were for a long time seen as old technology, and people assumed these were huge, low-power, nontunable things, so they looked to other terahertz sources,” Steven Johnson of MIT said….READ MORE