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Document type:
Zeitschriftenaufsatz 
Author(s):
Fathololoumi, S.; Dupont, E.; Chan, C.W.I.; Wasilewski, Z.R.; Laframboise, S.R.; Ban, D.; Mátyás, A.; Jirauschek, C.; Hu, Q.; Liu, H.C. 
Title:
Terahertz quantum cascade lasers operating up to ~200 K with optimized oscillator strength and improved injection tunneling 
Abstract:
A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is achieved by optimizing the lasing transition oscillator strength of the resonant phonon based three-well design. The optimum oscillator strength of 0.58 was found to be larger than that of the previous record (0.41) by Kumar et al. [Appl. Phys. Lett. 94, 131105 (2009)]. The choice of tunneling barrier thicknesses was determined with a simplified density matrix model, which converged towards higher tunneling c...    »
 
Journal title:
Optics Express, Vol. 20, Issue 4, pp. 3866-3876 (2012) 
Year:
2012 
Year / month:
2012-02 
Quarter:
1. Quartal 
Month:
Feb 
Pages contribution:
3866 - 3876 
Language:
en 
Publisher:
The Optical Society