FIR quantum cascade lasers at lambda > 20 pm and THz emitters at lambda=80 mu m

Citation:

R Colombelli, F Capasso, A Straub, C Gmachl, MI Blakey, AM Sergent, DL Sivco, AY Cho, KW West, and LN Pfeiffer. 2002. “FIR quantum cascade lasers at lambda > 20 pm and THz emitters at lambda=80 mu m.” PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 13, 2-4, Pp. 848-853.

Abstract:

Quantum cascade lasers operating at lambda > 20 mum wavelength are reported. Pulsed operation as obtained up to 140 K with a peak power of few milliwatts at cryogenic temperatures, Laser action originates from interminiband transitions in ``chirped'' superlattice active regions. The waveguides are based on surface-plasmon modes confined at a metal semiconductor interface, but we also report on a 21.5 mum wavelength laser based on a double-sided interface-plasmon waveguide. This latter, contrary to the single-sided surface plasmon, is a viable waveguiding solution in the THz range, i.e. at wavelengths between 60 and 100 mum. Finally, intersubband electroluminescence is reported in a quantum cascade structure based on asymmetric superlattice active regions and designed for emission in the THz range at lambda approximate to 80 mum. (C) 2002 Published by Elsevier Science B.V.

Notes:

10th International Conference on Modulated Semiconductor Structures, LINZ, AUSTRIA, JUL 23-27, 2001