Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4881182
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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
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1306397] Funding Source: National Science Foundation
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We demonstrate room temperature continuous wave THz sources based on intracavity difference-frequency generation from mid-infrared quantum cascade lasers. Buried ridge, buried composite distributed-feedback waveguide with Cerenkov phase-matching scheme is used to reduce the waveguide loss and enhance the heat dissipation for continuous wave operation. Continuous emission at 3.6 THz with a side-mode suppression ratio of 20 dB and output power up to 3 mu W are achieved, respectively. THz peak power is further scaled up to 1.4 mW in pulsed mode by increasing the mid-infrared power through increasing the active region doping and device area. (C) 2014 AIP Publishing LLC.
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