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Vertical-cavity surface-emitting lasers (VCSELs) have achieved remarkable performance in threshold, speed, and efficiency. However the VCSELs have so far achieved their performance without the benefit of a buried-heterostructure (BH) gain structure. A high quality BH gain structure can be expected to dramatically improve VCSEL performance by eliminating parasitic charging effects in the perimeter...
Nanolasers made from III–V active materials and metal-clad cavities have attracted research interest because of the small volume possible with metal nanocavities.1 Proposed applications include intrachip optical interconnects and optical sensors. The metal-clad nanocavities are one of several cavity approaches being studied, and differ from dielectric and semiconductor nanocavities in their high optical...
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.
Large cavity, very low threshold single layer quantum dot laser diodes with threshold current density of 10 A/cm2, output power > 2 W, and very-low internal loss of 0.25 cm-1 are achieved at CW room-temperature. Mode-locked operation of a large cavity laser diode with 40 mum stripe width is demonstrated at 3.75 GHz repetition rate.
In this presentation, a continuous-wave room temperature lasing at a threshold current density of 11.7 A/cm2 is reported. This is the lowest threshold current density ever reported for continuous-wave room temperature operation of a laser diode, to the authors' knowledge.
Photonic crystal slab nanocavities containing one layer of quantum dots have exhibited: strong coupling to a single quantum dot; tuning by condensation of xenon gas; linewidth broadening due to ensemble dot absorption; gain and lasing.
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.
Lasing behavior under optical pumping conditions is reported for photonic crystal double-heterostructure nanocavities with InAs quantum dot active regions. Coupling of this laser emission into a photonic crystal waveguide is also reported.
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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