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Comparison of low-temperature PL spectra from -thick QD samples with barriers, -thick barriers, and -thick barriers.
Comparison of AFM images of uncapped QD samples with different barrier thickness of (a) , (b) , (c) , and (d) . The scanned area is .
(a) Schematic diagram of QD laser structure, and (b) cross-sectional TEM image of the QD active region.
Room temperature cw and characteristics of QD laser. The inset shows the room temperature electroluminescence lasing spectrum.
Summary of RT pulsed and cw threshold current density, and lasing wavelength for lasers with different active layer structure.
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