期刊
OPTICS EXPRESS
卷 23, 期 15, 页码 19689-19697出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.019689
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资金
- United States National Science Foundation [ECCS 1128562, ECCS 1351142]
- U.S. DOE's National Nuclear Security Administration [DE-AC04-94AL85000]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1128562, 1351142] Funding Source: National Science Foundation
A 2.1 THz quantum cascade laser (QCL) based on a scattering-assisted injection and resonant-phonon depopulation design scheme is demonstrated. The QCL is based on a four-well period implemented in the GaAs/Al0.15Ga0.85As material system. The QCL operates up to a heat-sink temperature of 144 K in pulsed-mode, which is considerably higher than that achieved for previously reported THz QCLs operating around the frequency of 2 THz. At 46 K, the threshold current-density was measured as similar to 745 A/cm(2) with a peak-power output of similar to 10 mW. Electrically stable operation in a positive differential-resistance regime is achieved by a careful choice of design parameters. The results validate the robustness of scattering-assisted injection schemes for development of low-frequency (v < 2.5 THz) QCLs. (C) 2015 Optical Society of America
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