Title :
Ghost modes in Terahertz Quantum Cascade Laser waveguides
Author :
Tanvir, Huda ; Rahman, B.M.A. ; Grattan, K.T.V.
Author_Institution :
Sch. of Eng. & Math. Sci., City Univ. London, London, UK
Abstract :
Degeneration of the lasing mode in a Terahertz Quantum Cascade Laser due to interaction with parasitic ghost modes is demonstrated here through rigorous numerical analysis. We show that such interactions can adversely affect the performance of a QCL by causing abrupt rises in lasing threshold. We also show that such affects can be avoided by altering the width of the metal cladding layer.
Keywords :
numerical analysis; optical waveguides; quantum cascade lasers; lasing mode degeneration; metal cladding layer; numerical analysis; parasitic ghost modes; terahertz quantum cascade laser waveguides; Doping; Indexes; Metals; Optical waveguides; Plasmons; Quantum cascade lasers; Waveguide lasers;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6104778
