نتایج جستجو برای: quantum well laser
تعداد نتایج: 1937385 فیلتر نتایج به سال:
Measured gain compression, differential gain, and damping of strained quantum wire lasers are reported and related to attributes specifically traceable to carrier confinement in two dimensions. A comparison is made with the properties of ridge lasers grown simultaneously. Damping and K factors are found to be comparable in the two structures. The differential gain is found to increase by two or...
The possibility to achieve laser action at different THz frequencies employing the so-called vertical transition will be discussed. The intra-well or vertical optical transition presents a number of features that makes it an ideal candidate for a systematic study of resonant tunnelling and dephasing in quantum cascade lasers. Laser action at 3.5 THz with very low threshold employing a single qu...
Strain and band gap engineered epitaxial germanium (?-Ge) quantum-well (QW) laser structures were investigated on GaAs substrates theoretically experimentally for the first time. In this design, we exploit ability of an InGaAs layer to simultaneously provide tensile strain in Ge (0.7–1.96%) sufficient optical carrier confinement. The direct band-to-band gain, threshold current density (Jth), lo...
MOCVD growth and characterization of AlGaInN multiple quantum well heterostructures and laser diodes
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