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A team of researchers have built a terahertz laser that might one day see through clothes, book covers, and even skin, using laughing gas, according to a paper in Science.
The device operates in the terahertz range - a region of the electromagnetic spectrum above microwaves and below visible light. Terahertz lasers are relatively rare, since the wavelength of light is tricky to produce and control. Although they have been built before, older models shot infrared light through long tubes of methyl fluoride gas and were too clunky to be practical.
Laser - Researchers - Massachusetts - Institute - Technology
The new laser built by researchers led by the Massachusetts Institute of Technology (MIT) is much niftier. All the components required fit inside a shoe box and functions in room temperature. The light can also be tuned too, producing terahertz waves in the range of 0.251 to 0.955 terahertz (10^ 12 Hz).
The wacky gizmo works by zapping nitrous oxide, more commonly known as laughing gas, with an infrared light quantum cascade laser. A small cavity inside the device was filled with...
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