Oxide-free lithographic vertical-cavity surface-emitting lasers (VCSELs) are characterized for their thermal properties. VCSELs with minimum threshold temperatures < 20 °C demonstrate lasing at heat sink temperatures ≥ 190 °C, with high rollover cavity temperatures.
Optical characterization of a novel type of semiconductor microcavity based on a fully-buried, all-epitaxial design reveals many properties essential for a manufacturable technology. We demonstrate detailed mode-imaging, lasing, as well as a sizeable Purcell effect.
Summary form only given. Recent progress in microfabrication involving, etching processes makes it possible to engineer three-dimensional (3D) nanostructures from MBE-grown planar Fabry-Perot micro-cavities. The optical mode is confined laterally by implementing a thin dielectric (native oxide) aperture layer on top of the cavity spacer. The sample under investigation consists of a 16 period GaAs/AlAs...
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