Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4902245
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Funding
- National Science Foundation [ECCS-1231289, ECCS-1306397]
- Department of Homeland Security [HSHQDC-13-C-00034]
- Naval Air Systems Command [N68936-13-C-0124]
- Early Stage Innovations Grant from NASA's Space Technology Research Grants Program
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1306397] Funding Source: National Science Foundation
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We present a widely tunable, monolithic terahertz source based on intracavity difference frequency generation within a mid-infrared quantum cascade laser at room temperature. A three-section ridge waveguide laser design with two sampled grating sections and a distributed-Bragg section is used to achieve the terahertz (THz) frequency tuning. Room temperature single mode THz emission with a wide tunable frequency range of 2.6-4.2 THz (similar to 47% of the central frequency) and THz power up to 0.1 mW is demonstrated, making such device an ideal candidate for THz spectroscopy and sensing. (C) 2014 AIP Publishing LLC.
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