Journal
ELECTRONICS LETTERS
Volume 54, Issue 21, Pages 1229-1230Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el.2018.6062
Keywords
current density; quantum cascade lasers; phonons; microwave photonics; temperature 15 K; frequency 2; 4 THz to 3; 4 THz; temperature 15; 0 K; emission spectrum; threshold current density; longitudinal optical-phonon-assisted interminiband transitions; continuous wave laser emission; active region design; broadband heterogeneous terahertz frequency quantum cascade laser
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Funding
- EPSRC (UK) [EP/P021859/1]
- Royal Society project [IEC/NSFC/170384]
- EC Project [665158]
- ERC Project [681379]
- Royal Society
- Wolfson Foundation
- EPSRC [EP/P021859/1] Funding Source: UKRI
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The authors demonstrate a broadband, heterogeneous terahertz frequency quantum cascade laser by exploiting an active region design based on longitudinal optical-phonon-assisted interminiband transitions. They obtain continuous wave laser emission with a threshold current density of similar to 120 A/cm(2), a dynamic range of similar to 3.1, and an emission spectrum spanning from 2.4 to 3.4 THz at 15 K.
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