Download PDF by Rolf Haug: Advances in Solid State Physics 48

By Rolf Haug

ISBN-10: 354085858X

ISBN-13: 9783540858584

The 2008 Spring assembly of the Arbeitskreis Festkörperphysik used to be held in Berlin, Germany, among February 24 and February 29, 2008 together with the 72nd Annual assembly of the Deutsche Physikalische Gesellschaft. The 2008 assembly was once the most important physics assembly in Europe and one of the biggest physics conferences on the planet in 2008.

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Also simple pellets pressed from ZnO powder can serve as a laser active medium, as reported by Sun et al. [16]. e. e. I > 8 × Ith ) as recombination in an EHP. A better defined lasing system apart from nanopillars are single ZnO tetrapods grown with low density on sapphire or silicon substrates by a chemical vapor transport and condensation (CVTC) process [10]. Again, PL bands around 385 nm with multiple superimposed sharp lines were found, and the maximum emitted intensity was found in the center of the tetrapods.

Possibility adds many new ways of adding functionality to the nanowires. With the purpose of proving this principle, a quantum heterostructure was grown on the {110} facets of wires grown on a (111)B substrate. 7 As barrier layers. The whole structure was capped with an thin layer of GaAs. The substrates were rotated at 7 rpm to ensure a uniform deposition. Thanks to the geometry of the nanowires, the deposition resulted in a prismatic configuration of the QWs, which we call p-QW. The selective growth on the {110} facets was achieved by increasing the As4 beam flux to 5 · 10−5 mbar, which is typical for 110 surfaces.

D) Optical dark field image shows enough contrast from light scattering, (e) even though the nanowires are 100 nm or less in diameter, as seen from the carbon coated wire in this SEM image. For comparison, Fig. 3d shows a dark field optical image of the wires from the sample in Fig. 3a, showing that even though wires are 100 nm or less, there is sufficient contrast by scattering. In contrast to metal clusters showing a Mie resonance [26] the optical properties of nanowires are governed by its geometry and by the plasma-like response of a free electron gas inside it.

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Advances in Solid State Physics 48 by Rolf Haug

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