Terahertz (THz) frequencies remain among the least utilized in the electromagnetic
spectrum, largely due to the lack of powerful and compact sources. The invention of THz …

Since the 1960s advances in electronic and optoelectronic device technologies have been
primarily orchestrated by III-V semiconductors, which have led to an age of consumer …

Room temperature operation of terahertz quantum cascade lasers (THz QCLs) has been a
long-pursued goal to realize compact semiconductor THz sources. In this paper, we report …

The transport and gain properties of quantum cascade (QC) structures are investigated
using a nonequilibrium Green's function (NGF) theory which includes quantum effects …

SEMICONDUCTOR lasers are widely used in modern life. In telecommunications they send
signals for thousands of kilometres along optical fibres. In consumer electronics …

The temperature dependences of the threshold current and slope efficiency, as represented
by their respective characteristic temperature coefficients T 0 and T 1, are discussed for …

The accuracy of different transfer matrix approaches, widely used to solve the stationary
effective mass Schrodinger equation for arbitrary one-dimensional potentials, is investigated …

A considerable advance has recently been made in the development and optimization of
quantum cascade lasers (QCLs). 1, 2 In these complex multilayer structures coherent …

Abstract Temperature dependent Quantum Cascade Lasers are known for their advantages
when compared to conventional lasers. In this work, we will focus on their temperature …

This chapter reviews the fundamental physics and associated limitations of semiconductor
lasers operating across the mid-infrared (MIR) range of 2–20 μm. Using a combination of …