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In this paper, we present a theoretical study of strain and nonparabolicity effects in Mid-infrared (MIR) Ga x In 1-x As y Sb 1-y /Al x Ga y In 1-x-y As z Sb 1-z Multiple Quantum Well (MQW) Quantum Cascade Lasers (QCL). We use an envelope function k.P theory model to show the strong effects of bi-axial compressive strain and nonparabolicity...
In the present paper, we propose a new multi band metamaterial structure composed of a unit cell that has multiple hexagonal-shaped metal rings printed one inside the other. The introduced metamaterial composition exhibits multi-resonant behavior due to distinct magnetic resonances caused by the self and mutual couplings of each inclusion. The number of distinct magnetic resonances is determined by...
To answer to the increasing demand of antennas for portable terminals, many works were carried out these last years starting from the shorted-circuit quarter wave antenna more commonly called PIFA (Planar Inverted-F Antenna). These antennas have for principal advantages, their compactness and their weak manufacturing costs, in addition to their significant performances. In this article, we present...
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