We experimentally investigated the effect of oscillator strength (radiative transition
diagonality) on the performance of resonant phonon-based terahertz quantum cascade …

A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is
achieved by optimizing the lasing transition oscillator strength of the resonant phonon based …

We studied the temperature performance of split-well direct phonon terahertz quantum
cascade lasers and found that it is limited by a lasing instability that becomes significant as …

For terahertz quantum cascade lasers employing the nonalignment injection scheme via
direct-phonon resonance, this study presents the crucial effect of parasitic absorption in the …

We present a highly diagonal “split-well resonant-phonon”(SWRP) active region design for
GaAs/Al_0. 3Ga_0. 7As terahertz quantum cascade lasers (THz-QCLs). Negative differential …

The state of the art terahertz-frequency quantum cascade lasers have opened a plethora of
applications over the past two decades by testing several designs up to the very limit of …

We present an experimental study on a terahertz quantum cascade laser (THz QCL) design
that combines both two-well injector and direct-phonon scattering schemes, ie, a so-called …

We report an extraction-controlled terahertz (THz)-frequency quantum cascade laser design
in which a diagonal LO-phonon scattering process is used to achieve efficient current …

We present a so-called “split-well direct-phonon” active region design for terahertz quantum
cascade lasers (THz-QCLs). Lasers based on this scheme profit from both elimination of …

We analyze the temperature performance of five terahertz (THz)-frequency quantum
cascade lasers based on a three-quantum-well resonant-phonon depopulation design as a …