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Researchers have created a new terahertz radiation emitter with coveted frequency adjustment capability. The compact source could enable the development of futuristic communications, security, biomedical, and astronomical imaging systems.
The experimental setup showing the different components of the system and highlighting the path followed by the quantum cascade laser light (red) and terahertz radiation (blue). Courtesy of Arman Amirzhan, Harvard SEAS.
Terahertz electromagnetic frequencies have been sought after for their range of applications, such as high bandwidth, high resolution, long-range sensing, and ability to visualize objects through materials. However, the costliness, bulk, inefficiencies, and lack of tunability of…