Leap-Ahead Technology Will Create First-Of-Its-Kind Laser
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The terahertz frequency range — which sits in the middle of the electromagnetic spectrum between microwaves and infrared light — has remained difficult to reach for applications because most terahertz sources are either very bulky, inefficient, or rely on low-temperature devices to produce these elusive frequencies with limited tuning.
The new research, conducted by a team from at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), in collaboration with the DEVCOM Army Research Lab and DRS Daylight Solutions, demonstrates a first-of-its-kind terahertz laser that is compact, operates at room temperature and can produce 120 individual frequencies spanning the 0.25 — 1.3 THz, far more range than previous terahertz sources, according to sciencedaily.com. The laser could be used in a range of applications in imaging, security, and communications.
“This is a leap-ahead technology for generating terahertz radiation,” said senior author of the paper, Federico Capasso. “Thanks to its compactness, efficiency, wide tuning range, and room temperature operation, this laser has the potential to become a key technology to bridge the terahertz gap.”
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