Antimonide interband and intersubband mid-IR and terahertz lasers

Antimonide semiconductor lasers for the mid-infrared and terahertz spectral regions are considered. It is predicted that optically pumped interband type-II lasers will be advantageous at long wavelengths, out to View the MathML source. In the mid-IR, antimonide intersubband lasers should have higher gains and longer carrier lifetimes than InGaAs/InAlAs quantum cascade lasers, and hence have prospects for room-temperature cw operation. Spin-polarized antimonide intersubband lasers with applied magnetic fields are projected to display room-temperature cw emission at View the MathML source.