The authors report the fabrication of high-power strained quantum cascade lasers working in
continuous mode above 370 K⁠. The devices, processed in narrow buried heterostructures …

We present high-power surface-emitting second-order distributed feedback quantum-
cascade lasers in GaAs and InP material systems. The GaAs device, grown by molecular …

We propose a new class of gratings having multiple spatial frequencies. Their design relies
on the use of small aperiodic grating sequences as unit cells whose repetition forms a …

A monolithic coupling scheme for mid-infrared quantum cascade laser arrays is investigated
with respect to brightness enhancement. The tree-shaped resonator enables parallel …

By using a semiconductor/metal grating formed on the episide of a quantum-cascade
structure, distributed feedback lasing has been achieved with beam emission through the …

Midinfrared single mode emission, up to 20 C⁠, for a distributed feedback structure
consisting of lateral index variation on both sides of a rib waveguide is achieved on a …

We present the pulsed operation at room temperature of different strained In Ga As∕ Al In
As quantum-cascade lasers grown by low-pressure metalorganic vapor-phase epitaxy …

Quantum cascade lasers can be efficient infrared radiation sources and consist of several
hundreds of very thin layers arranged in stacks that are repeated periodically. Both the …

A technique is described that enables the mid infrared spectroscopic study of the
intersubband electron distribution in quantum cascade lasers under operating conditions. By …

A series of quantum-cascade lasers emitting at λ≈ 11μm with different numbers of cascades
in the active region–between 25 and 200–grown by gas-source molecular beam epitaxy, is …