Widely tunable terahertz source based on intra-cavity frequency mixing in quantum cascade laser arrays

Journal Article · Mon Jun 29 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4923374· OSTI ID:22483108

Jiang, Aiting; Jung, Seungyong; Jiang, Yifan; Kim, Jae Hyun; Vijayraghavan, Karun ^[1]

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1. Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712 (United States)

We demonstrate a compact monolithic terahertz source continuously tunable from 1.9 THz to 3.9 THz with the maximum peak power output of 106 μW at 3.46 THz at room temperature. The source consists of an array of 10 electrically tunable quantum cascade lasers with intra-cavity terahertz difference-frequency generation. To increase fabrication yield and achieve high THz peak power output in our devices, a dual-section current pumping scheme is implemented using two electrically isolated grating sections to independently control gain for the two mid-IR pumps.

• OSTI ID: 22483108
• Journal Information: Applied Physics Letters, Vol. 106, Issue 26; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CONTROL
FABRICATION
FREQUENCY MIXING
GRATINGS
LASERS
PEAK LOAD
PUMPING
PUMPS
TEMPERATURE RANGE 0273-0400 K
YIELDS