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A novel colloidal quantum dot-polyimide nanocomposite system aimed for integration with GaN-optoelectronics for color-conversion and visible light communications is reported. The nanocomposites' static and dynamic optical properties, including modulation responses, are assessed.
The main requirements for the MCT (CdxHg1-xTe) structures optimization for increase of the stimulated emission wavelength under optical pumping are discussed. The stimulated emission at wavelengths 2-2.5 μm at room temperature from optimized MCT structures is observed experimentally. The obtained experimental data are the first observation of stimulated emission from the MCT structures at these wavelengths...
Colloidal semiconductor nanocrystals are nanoscale materials whose optical, electronic and transport properties, due to their strong dependence on size and shape, can be finely tuned by advanced chemical synthesis approaches. Among various types of semiconductor nanocrystals, core-shell nanostructures comprised of a semiconductor core that is covered by a thin shell of another type of semiconductor...
A full-color pixel consisting of CdSe, ZnO, and CdS nanowires has been heterogeneously integrated on a substrate with lithographic accuracy using lateral optoelectronic tweezers (LOET). Red (CdSe, 685 nm), blue (CdS, 496 nm), and green (ZnO, 518 nm) light emissions are obtained by selectively pumping the corresponding nanowires. Potentially the nanowires can be directly assembled on CMOS driver circuit...
Frequency up-converted lasing emission at visible wavelengths was observed from nanocrystal-infiltrated silica microbeads, which has been explained by the coupling of the two-photon pumped biexciton gain to the whispering gallery mode in a spherical microcavity.
The experimental observation of stimulated radiation of optically pumped CdxHg1-xTe structures in the wavelength range of 1.4 - 4.5 mum is reported. In the experiments, graded-gap CdxHg1-xTe samples grown on GaAs and Si substrates by molecular beam epitaxy were used. Superluminescence of such structures was observed at 77 - 300 K under the pulsed pumping of the samples by a Nd:YAG laser at a wavelength...
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