Widely tunable compact terahertz gas lasers
Abstract
Compared with other wavelengths, coherent sources of electromagnetic radiation in the terahertz regime are relatively scarce. Despite a number of applications in security imaging, spectroscopy, and chemical analysis, it has been experimentally challenging to produce such light. Chevalier et al. demonstrate an approach involving the excitation of a molecular gas with a quantum cascade laser. They show that they can tune into a broad range of desired wavelengths by carefully selecting the required molecular transition. A compact platform—the size of a shoe box—and widely tunable source of coherent terahertz radiation should find immediate application across a number of fields.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 15, 2019
- Source ID
- 10.1126/science.aay8683
Entities
People
- Arman Amirzhan
- Fan Wang
- Federico Capasso
- Henry O. Everitt
- Marco Piccardo
- Paul Chevalier
- Steven G. Johnson
Organizations
- Army Research Office
- Duke University
- Harvard University
- Massachusetts Institute of Technology
- National Science Foundation
- United States Army