Microcavity THz quantum cascade laser

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Date
2006
Author
Fasching, Gernot
Benz, Alexander
Zobl, Reinhard
Andrews, Aaron Maxwell
Roch, Tomas
Schrenk, Werner
Strasser, Gottfried
Tamošiūnas, Vincas
Unterrainer, Karl
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Abstract
We report operation of disk and ring shaped terahertz (THz) quantum-cascade lasers (QCLs) emitting in the THz region between 3.0 and 3.4 THz. The GaAs/Al0.15Ga0.85As heterostructure is based on longitudinal-optical phonon scattering for depopulation of the lower radiative state. A double metal waveguide is used to confine the whispering gallery modes in the gain medium. The threshold current density is at 5 K. 3D Finite-Difference Time-Domain (FDTD) simulations were performed to obtain the field distributions within a THz QCl resonator at different frequencies.
Issue date (year)
2006
URI
https://etalpykla.vilniustech.lt/handle/123456789/143580
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