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In this contribution we report on the fabrication and the emission characteristics of electrically pumped QDs embedded in monolithically grown microcavity p-i-n-diode structures in the InP/AlGalnP material system. By incorporation of an oxide aperture with small diameter the current path in the QD VCSEL was strongly confined so that optical transverse modes appear. We can clearly see the laser emission...
The polarization direction of broad-area vertical-cavity surface-emitting lasers is found to be parallel to the wavevector below threshold. The characteristics of the transition through threshold are studied.
In this work we identify the underlying mechanisms of polarization selection. Vertical-cavity surface-emitting lasers (VCSELs) with a large aperture emit, though longitudinal single mode, a rich spectrum of transverse modes, which is an intriguing subject for studying non-linear pattern formation. The material gain curve and the resonance of the laser cavity shift both depending on temperature, but...
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