Self-organization of InAs quantum-dot clusters directed by droplet homoepitaxy.
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Biomedical subjects
Gregory J Salamo
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Direct spectroscopic evidence for the formation of one-dimensional wetting wires during the growth of InGaAs/GaAs quantum dot chains.
We report direct spectroscopic evidence for the formation of one-dimensional (1D) wetting wires (WWs) during the Stransky-Krastanov growth of InGaAs/GaAs quantum dot (QD) chains. The wire-like nature of these 1D WWs was demonstrated by their 1D density of states and absorption anisotropies from the photoluminescence excitation measurements. Two groups of QDs were found sitting on top of these 1D WWs and the traditional two-dimensional wetting layers, respectively, with size-dependent emission polarization anisotropies of ca. 6-25% because of their elongated shapes.
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Fixed three-dimensional holographic images.
Three-dimensional holograms were recorded in a cerium-doped, strontium barium niobate (SBN:75) photorefractive crystal. These holograms are shown to not degrade after more than one week of continuous readout and to reconstruct reproductions of the original object with an observable field of view of approximately 35 degrees.
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