In search of a Si/SiGe THz quantum cascade laser

Paul, D.J. et al. (2005) In search of a Si/SiGe THz quantum cascade laser. In: Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, Atlanta, GA, USA, 08-10 Sept 2004, pp. 143-146. ISBN 0780387031 (doi: 10.1109/SMIC.2004.1398188)

Abstract

While electroluminescence has been demonstrated at terahertz frequencies from Si/SiGe quantum cascade emitters, to date no laser has been achieved due to poor vertical confinement of the optical mode. A method of increasing the vertical confinement of the optical mode for a Si/SiGe quantum cascade laser is demonstrated using silicon-on-silicide technology. Such technology is used with epitaxial growth to demonstrate a strain-symmetrised 600 period Si/SiGe quantum cascade interwell emission and the polarisation is used to demonstrate the optical confinement. Electroluminescence is demonstrated at /spl sim/3 THz (/spl sim/100 /spl mu/m) from an interwell quantum cascade emitter structure. Calculated model overlap and waveguide losses for ridge waveguides are comparable to values from GaAs quantum cascade lasers demonstrated at terahertz frequencies.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Paul, Professor Douglas
• Authors: Paul, D.J., Townsend, P., Lynch, S.A., Kelsall, R.W., Ikonic, Z., Harrison, P., Norris, D.J., Liew, S.L., Cullis, A.G., Li, X., Zhang, J., Bain, N., Gamble, H.S., Tribe, W.R., and Arnone, D.D.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Research Group: Semiconductor Devices
• ISBN: 0780387031