Title :

Optical external efficiency of terahertz quantum cascade laser based on Čerenkov difference frequency generation

Author(s) :

Hamadou, A. [Auteur]
Thobel, Jean-Luc [Auteur]
SImuLation PHYsique de Dispositifs Electroniques et opto-electroniques - IEMN [SILPHYDE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Lamari, S. [Auteur]

Journal title :

Journal of Nonlinear Optical Physics and Materials

Pages :

1950036

Publisher :

World Scientific Publishing

Publication date :

2019-12

ISSN :

0218-8635

English keyword(s) :

Terahertz quantum cascade laser
difference frequency generation
optical external efficiency
Čerenkov
phased matching

HAL domain(s) :

Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
Physique [physics]/Matière Condensée [cond-mat]

English abstract : [en]

In this paper, we consider terahertz sources based on Čerenkov difference frequency generation in a dual-wavelength mid-infrared quantum cascade laser and calculate analytically the optical external efficiency of the ...
Show more >In this paper, we consider terahertz sources based on Čerenkov difference frequency generation in a dual-wavelength mid-infrared quantum cascade laser and calculate analytically the optical external efficiency of the out-going terahertz wave. The mid-infrared pumps operate simultaneously and have a common upper level. For short cavity lengths and low terahertz losses in the substrate, we find that implementation of the Čerenkov emission scheme in terahertz difference frequency generation quantum cascade lasers improves the optical external efficiency dramatically. The maximum value of the latter is close to 19%, but is only attainable if the laser exhibits negligible mid-infrared transmission losses.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL