Terahertz bound-to-continuum quantum-cascade lasers based on optical-phonon scattering extraction

Scalari, Giacomo; Hoyler, Nicolas; Giovannini, Marcella; Faist, Jérôme
May 2005
Applied Physics Letters;5/2/2005, Vol. 86 Issue 18, p181101
Academic Journal
A design for a terahertz quantum-cascade laser emitting at λ≃82 μm is presented. A bound-to-continuum active region is coupled to an optical phonon extraction stage in order to improve the population inversion at high temperatures. Device performances in a double-metal waveguide reach 116K in pulsed operation and 53K in continuous wave. A detailed characterization of two waveguide configurations is also presented together with a comparison with previous bound-to-continuum design.


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