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InGaAsAlInAs/InP terahertz quantum cascade laser

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5 Author(s)
Ajili, Lassaad ; Institute of Physics, University of Neuchâtel, ACH-2000 Neuchâtel, Switzerland ; Scalari, G. ; Hoyler, Nicolas ; Giovannini, Marcella
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Operation of a quantum-cascade laser based on the In0.52Al0.48AsIn0.53Ga0.47As/InP material is demonstrated at a frequency of 3.6 terahertz. The active region is based on a bound-to-continuum transition combined with an optical phonon extraction. The optical waveguide exploits a combination of metallic and dielectric confinement. Threshold current density of 460 A/cm2 at 10 K and a maximum operating temperature of 45 K are achieved.

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Applied Physics Letters  (Volume:87 ,  Issue: 14 )