Journal
APPLIED PHYSICS LETTERS
Volume 84, Issue 8, Pages 1266-1268Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1650905
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- Engineering and Physical Sciences Research Council [GR/S00392/01] Funding Source: researchfish
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A THz (lambdasimilar to80 mum) quantum-cascade laser utilizing alternating photon- and phonon-emitting stages has been developed to achieve efficient extraction of electrons from the lower laser level. Thermal backfilling of electrons is drastically reduced leading to an operation up to 95 K and a weak temperature dependence of the power versus current slope efficiency. The threshold current density is 280 A cm(-2) at 6 K and increases to 580 A cm(-2) at 90 K. Peak output powers of 10 mW at 30 K and 4 mW at 80 K are obtained. (C) 2004 American Institute of Physics.
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