Title :
Terahertz waveguide design for GaSb quantum cascade laser
Author :
Yasuda, Hiroaki ; Hosako, Iwao ; Sekine, Norihiko
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Tokyo
Abstract :
Waveguides for a terahertz quantum cascade laser (THz-QCL) using a GaSb/AlSb (or AlGaSb) material system were designed. High optical confinement and low loss propagation were achieved with a simple fabrication process and low costs by using a GaAs substrate and by optimizing carrier densities in contact layers.
Keywords :
III-V semiconductors; aluminium compounds; electromagnetic wave propagation; gallium arsenide; optical waveguides; quantum cascade lasers; AlSb; GaAs; GaSb; carrier density; fabrication process; finite element method; loss propagation; material system; optical confinement; substrate; surface plasmon; terahertz quantum cascade laser; terahertz waveguide design; Carrier confinement; Cost function; Optical design; Optical device fabrication; Optical losses; Optical materials; Optical propagation; Optical waveguides; Propagation losses; Quantum cascade lasers; Terahertz; finite element method; quantum cascade laser; surface plasmon; waveguide;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429666
