TITLE

Effects of the one-dimensional quantum barriers in pyramidal quantum dots

AUTHOR(S)
Michelini, F.; Dupertuis, M.-A.; Kapon, E.
PUB. DATE
May 2004
SOURCE
Applied Physics Letters;5/17/2004, Vol. 84 Issue 20, p4086
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We investigated theoretically the effects of the one-dimensional barriers on the electronic states in a quantum dot grown on a nonplanar substrate. These peculiar barriers drastically modify the confined carrier wave functions and their energies. Connecting the quantum wire to the pyramidal quantum dot leads to an enhancement in the ground to first excited state separation energy and a simultaneous large reduction of the energy size sensitivity.
ACCESSION #
13029194

 

Related Articles

  • Selective-area vapor-liquid-solid growth of tunable InAsP quantum dots in nanowires. Dalacu, Dan; Mnaymneh, Khaled; Xiaohua Wu; Lapointe, Jean; Aers, Geof C.; Poole, Philip J.; Williams, Robin L. // Applied Physics Letters;6/20/2011, Vol. 98 Issue 25, p251101 

    A process is described where the position, size, and cladding of an InP nanowire with an embedded InAsP quantum dot are determined by design through lithography, processing, and growth. The vapor-liquid-solid growth mode on a patterned substrate is used to grow the InP core and defines the...

  • Thermopiezoelectric and Nonlinear Electromechanical Effects in Quantum Dots and Nanowires. Patil, Sunil; Bahrami-Samani, M.; Melnik, R. V. N.; Toropova, M.; Zu, Jean // AIP Conference Proceedings;1/4/2010, Vol. 1199 Issue 1, p327 

    We report thermopiezoelectric (TPE) and nonlinear electromechanical (NEM) effects in quantum dots (QD) and nanowires (NW) analyzed with a model based on coupled thermal, electric and mechanical balance equations. Several representative examples of low dimensional semiconductor structures (LDSNs)...

  • Magnetic field effects on low dimensional electron systems: Luttinger liquid behaviour in a quantum wire. Bellucci, S.; Onorato, P. // European Physical Journal B -- Condensed Matter;May2005, Vol. 45 Issue 1, p87 

    We discuss the effects of a strong magnetic field in quantum wires. We show how the presence of a magnetic field modifies the role played by electron electron interaction producing a strong reduction of the backward scattering corresponding to the Coulomb repulsion. We discuss the consequences...

  • Enhancement of the Purcell effect for colloidal CdSe/ZnS quantum dots coupled to silver nanowires by a metallic tip. Wang, Y. C.; Yuan, C. T.; Kuo, M. Y.; Wu, M. C.; Tang, Jau; Shih, M. H. // Applied Physics Letters;6/18/2012, Vol. 100 Issue 25, p253110 

    In this study, the Purcell effect for CdSe/ZnS quantum dots emission coupled to a silver nanowire cavity was investigated. We manipulated the interaction between colloidal quantum dots (QDs) and an Ag NW in the presence of a metallic tip. When a metal tip approaches the Ag NW, the Ag surface...

  • Imaging correlated wave functions of few-electron quantum dots: Theory and scanning tunneling spectroscopy experiments. Rontani, Massimo; Molinari, Elisa; Maruccio, Giuseppe; Janson, Martin; Schramm, Andreas; Meyer, Christian; Matsui, Tomohiro; Heyn, Christian; Hansen, Wolfgang; Wiesendanger, Roland // Journal of Applied Physics;4/15/2007, Vol. 101 Issue 8, p081714 

    We show both theoretically and experimentally that scanning tunneling spectroscopy (STS) images of semiconductor quantum dots may display clear signatures of electron-electron correlation. We apply many-body tunneling theory to a realistic model, which fully takes into account correlation...

  • Self-Assembly of Nanostructures on (631)-Oriented GaAs Substrates. López-López, M.; Cruz-Hernández, E.; Martínez-Velis, I.; Rojas-Ramírez, J.; Ramírez-López, M.; Pulzara-Mora, A.; Hernández-Rosas, J. // AIP Conference Proceedings;11/27/2007, Vol. 960 Issue 1, p210 

    In this work we present the growth and characterization of GaAs self-assembled quantum wires (SAQWRs), and InAs self-assembled quantum dots (SAQDs) by molecular beam epitaxy on (631)-oriented GaAs substrates. Adatoms on the (631) crystal plane present a strong surface diffusion anisotropy which...

  • Negative Coulomb Drag in Parallel Quantum Wires Having Coupled Two Dots. Honda, Motonari; Yamamoto, Michihisa; Stopa, Michael; Tarucha, Seigo // AIP Conference Proceedings;2005, Vol. 772 Issue 1, p783 

    We have fabricated capacitively coupled two quantum wires having a series of quantum dots to study Coulomb drag between the two quantum wires. We have observed strong negative Coulomb drag when the electron transport through the dots is in the tunneling regime for both wires. This indicates that...

  • Effects of quantum confinement and shape on band gap of core/shell quantum dots and nanowires. Faming Gao // Applied Physics Letters;5/9/2011, Vol. 98 Issue 19, p193105 

    A quantum confinement model for nanocrystals developed is extended to study for the optical gap shifts in core/shell quantum dots and nanowires. The chemical bond properties and gap shifts in the InP/ZnS, CdSe/CdS, CdSe/ZnS, and CdTe/ZnS core/shell quantum dots are calculated in detail. The...

  • Growth and photoluminescence of InxGa1-xAs quantum dots on the surface of GaAs nanowires by metal organic chemical vapor deposition. Yan, Xin; Zhang, Xia; Ren, Xiaomin; Li, Junshuai; Lv, Xiaolong; Wang, Qi; Huang, Yongqing // Applied Physics Letters;7/9/2012, Vol. 101 Issue 2, p023106 

    InxGa1-xAs (x = 0.6-1) quantum dots are grown on the {112} side facets of GaAs nanowires by metal organic chemical vapor deposition. The emission spectrum of quantum dots exhibits a multi-peak structure due to size and composition fluctuations. The emission wavelength of quantum dots ranges from...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics