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High-power terahertz quantum-cascade lasers

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4 Author(s)
B. S. Williams ; Dept. of Electr. Eng. & Comput. Sci., Massachusetts Inst. of Technol., Cambridge, MA, USA ; S. Kumar ; Q. Hu ; J. L. Reno

Demonstration of quantum-cascade lasers at ∼4.4 THz (λ∼68 μm), which are measured to emit 248 mW peak power in pulsed mode, and 138 mW continuous-wave power at heatsink temperatures of 10 K, is reported. These lasers are based on a resonant-phonon depopulation scheme, and use a semi-insulating surface-plasmon waveguide.

Published in:

Electronics Letters  (Volume:42 ,  Issue: 2 )