Mid-infrared quantum cascade lasers are semiconductor injection lasers whose active core
implements a multiple-quantum-well structure. Relying on a designed staircase of …

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

Advanced materials and processing techniques are based largely on the generation and
control of non-homogeneous microstructures, such as precipitates and grain boundaries. X …

High-power and highly directional semiconductor microcylinder lasers based on an optical
resonator with deformed cross section are reported. In the favorable directions of the far …

A unipolar injection quantum cascade (QC) laser grown in an AlGaAs/GaAs material system
by molecular beam epitaxy, is reported. The active material is a 30 period sequence of …

Following an introduction to the history of the invention of the quantum cascade (QC) laser
and of the band-structure engineering advances that have led to laser action over most of …

The fundamental mechanism behind laser action leads in general only to narrowband,
single-wavelength emission. Several approaches for achieving spectrally broadband laser …

Experimental evidence that in quantum cascade lasers electron injection into the active
region is controlled by resonant tunneling between two-dimensional subbands is discussed …

A quantum-cascade long-wavelength infrared laser based on superlattice active regions has
been demonstrated. In this source, electrons injected by tunneling emit photons …

The book presents information about Terahertz science, Terahertz photodetectors and
Terahertz Lasers. A special emphasis is given to room temperature operation of long …