Title :
Inverted-mesa quantum cascade lasers
Author :
Farmer, C.D. ; Ironside, C.N. ; Magill, J.V. ; Stanley, C.R. ; Boyd, A.R. ; Keightley, P.T. ; Wilson, L.R. ; Cockburn, J.W. ; Skolnick, M.S.
Author_Institution :
Dept. of Electron. & Electr. Eng., Glasgow Univ., UK
Abstract :
Summary form only given. We address practical issues involving quantum cascade laser (QCL) fabrication, introduce a new fabrication technique which permits a reduction in the waveguide width which is simple to implement, and report on quantum cascade devices lasing at /spl lambda/=5 /spl mu/m fabricated using this new scheme. The QC wafer, based on the design demonstrated by Faist et al. (1996), was grown in-house. Production of QC lasers with reduced threshold currents are envisaged through a reduction in the laser waveguide core width.
Keywords :
semiconductor lasers; waveguide lasers; current spreading; fabrication; inverted-mesa quantum cascade lasers; self-aligned process; threshold current; waveguide width; Conducting materials; DH-HEMTs; Distributed Bragg reflectors; Distributed feedback devices; Gratings; Laser feedback; Quantum cascade lasers; Semiconductor waveguides; Surface emitting lasers; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.833999
