Quantum cascade (QC') lasers are reviewed. These are semiconductor injection lasers
based on intersubband transitions in a multiple-quantum-well (QW) heterostructure …

This book focuses on the theory of phonon interactions in nanoscale structures with
particular emphasis on modern electronic and optoelectronic devices. The continuing …

A unipolar semiconductor laser emitting in the mid-infrared spectral region is demonstrated.
The laser scheme relies on a simple three-level system in GaAs/AlGaAs asymmetric coupled …

We fabricated a communication wavelength photodetector based on intraband transition in
Ga N∕ Al N self-assembled quantum dot heterostructures. The quantum dot photodetector …

An electrically pumped three-level system was designed and fabricated using an
AlGaAs/GaAs multiple quantum well structure. Under appropriate biases, the structure emits …

Tunable, unipolar, near-infrared intraband optical gain is demonstrated in semiconductor
colloidal quantum wells, expanding the form and optical range for potential infrared …

The authors report the observation of room-temperature intersubband luminescence at λ=
2.13 μ m from Ga N∕ Al N quantum wells under optical pum** at λ= 0.98 μ m⁠. The …

Population inversion in inter-subband emitters and lasers depends critically on the lifetimes
of the nonradiative inter-subband transitions. We find that the often neglected Auger-type …

We demonstrate operation of a high-power quantum fountain unipolar laser relying on
intersubband emission in optically pumped GaAs/AlGaAs quantum wells. The collected …

Multi-particle Auger interactions are one of the major intrinsic limiting factors for lasing
applications of lead halide perovskites. In this communication, we report a possible way to …