Dual-mode microcavity THz quantum-cascade lasers
Date
2007Author
Fasching, Gernot
Benz, Alexander
Andrews, Aaron Maxwell
Zobl, Reinhard
Roch, Tomas
Schrenk, Werner
Strasser, Gottfried
Tamošiūnas, Vincas
Unterrainer, Karl
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We present double-metal microdisk and microring terahertz (THz) quantum-cascade lasers (QCls) with diameters reduced down to less than the free-air emission wavelength which exhibit a threshold current density of 380 A/cm2. Continuos-wave mode operation was observed up to a heat-sink temperature of 79 K. Measurement results are in accordance with results obtained from 3D Finite-Differente Time-Domain (FDTD) simulations.