Atul Konkar

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We report on high-resolution transmission electron microscope structural studies of InAs colloidal semiconductor nanocrystal quantum dots (NCQDs) on ultrathin GaAs (001) semiconductor single-crystal substrates. We employ a benign method for preparing electron transparent specimens that is suitable for the study of such fragile samples. The image contrast(More)
We have examined the optical properties of self-assembled InAs quantum dots (QDs) grown on pre-patterned GaAs(001) substrates with time-resolved cathodoluminescence (CL) imaging and spectroscopy techniques. InAs QDs were selectivley formed on mesa stripes using a novel application in self-assembled molecular beam epitaxial growth which entailed the growth(More)
Integration of semiconductor epitaxical nanostructures and nanocrystals into two classes of quantum structures, uncovered adsorbed nanocrystals or buried via epitaxical overgrowth, is successfully demonstrated through structural and optical studies. The combination InGaAs/GaAs epitaxical structures and InAs nanocrystals is employed as a vehicle with the(More)
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