TITLE

Carrier transport and luminescence in inverted-pyramid quantum structures

AUTHOR(S)
Leifer, K.; Hartmann, A.; Ducommun, Y.; Kapon, E.
PUB. DATE
December 2000
SOURCE
Applied Physics Letters;12/11/2000, Vol. 77 Issue 24
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Cathodoluminescence spectroscopy and wavelength-dispersive imaging were employed for investigating the carrier transport and recombination in GaAs/AlGaAs inverted-pyramid quantum dot (QD) heterostructures grown on patterned (111)B GaAs substrates. The spectra and images clearly evidence carrier recombination in quantum wells and quantum wires (QWR) and show potential variations in these structures. Luminescence from the lens-shaped QDs was identified and characterized as a function of the GaAs layer thickness. Furthermore, we show a tapering of the GaAs QWR that self-forms at the corners of the pyramids. Application of such tapered QWRs as "exciton accelerators" is discussed. © 2000 American Institute of Physics.
ACCESSION #
4413670

 

Related Articles

  • Cathodoluminescence of laser AIIBVI heterostructures. Ivanov, A.S.; Vasilev, V.I.; Sedova, I.V.; Sorokin, S.A.; Sitnikova, A.A.; Konnikov, S.G.; Popova, T.B.; Zamoryanskaya, M.V. // Semiconductors;Apr2007, Vol. 41 Issue 4, p478 

    A Cathodoluminescence (CL) method has been used for studies of ZnSe-based heterostructures with a CdSe fractional-monolayer recombination region. Electron beams with energies of 1–25 keV provide the ability to analyze CL bands associated with different layers of the heterostructure and...

  • The effects of doping and shell thickness on the optical and magnetic properties of Mn/Cu/Fe-doped and Co-doped ZnS nanowires/ZnO quantum dots/SiO2 heterostructures. Cao, Jian; Yang, Jinghai; Yang, Lili; Wei, Maobin; Feng, Bo; Han, Donglai; Fan, Lin; Wang, Bingji; Fu, Hao // Journal of Applied Physics;Jul2012, Vol. 112 Issue 1, p014316 

    In this paper, we demonstrated the encapsulation of Mn/Cu/Fe-doped and co-doped ZnS nanowires (NWs) and ZnO quantum dots (QDs) with a layer of mesoporous SiO2 shell for the purpose of integrating dual emission and ferromagnetism property into one common nanostructure at room temperature. Within...

  • Room-Temperature Photoluminescence at 1.55μm from Heterostructures with InAs/InGaAsN Quantum Dots on GaAs Substrates. Odnoblyudov, V. A.; Egorov, A. Yu.; Kryzhanovskaya, N. V.; Gladyshev, A. G.; Mamutin, V. V.; Tsatsul’nikov, A. F.; Ustinov, V. M. // Technical Physics Letters;Nov2002, Vol. 28 Issue 11, p964 

    Room-temperature photoluminescence (PL) at 1.55 µm from heterostructures with InAs/InGaAsN quantum dots (QDs) grown by MBE on GaAs substrates is demonstrated for the first time. The effect of nitrogen incorporated into InAs/InGaAsN QDs on the PL wavelength and intensity was studied. The...

  • Photoelectric Spectroscopy of InAs/GaAs Quantum Dot Heterostructures in a Semiconductor/Electrolyte System. Karpovich, I. A.; Gorshkov, A. P.; Levichev, S. B.; Morozov, S. V.; Zvonkov, B. N.; Filatov, D. O. // Semiconductors;May2001, Vol. 35 Issue 5, p543 

    The photovoltaic effect in the semiconductor/electrolyte junction is an effective method for investigation of the energy spectrum of InAs/GaAs heterostructures with self-assembled quantum dots. An important advantage of this method is its high sensitivity. This makes it possible to obtain...

  • Spatial Distribution of Elastic Deformations in Ge/Si Structures with Quantum Dots. Nenashev, A. V.; Dvurechenskii, A. V. // Journal of Experimental & Theoretical Physics;Sep2000, Vol. 91 Issue 3, p497 

    A method is developed for calculating the elastic deformation in coherently strained heterostructures on the basis of the valence force field (VFF) model using the Green's function of the "atomistic" elastic problem. The spatial distribution of the elastic deformations in a Ge/Si system with...

  • Observation of built-in electric field in InP self-assembled quantum dot systems. Davydov, V.; Ignatiev, I.; Ren, H.-W.; Sugou, S.; Masumoto, Y. // Applied Physics Letters;5/17/1999, Vol. 74 Issue 20, p3002 

    Studies the Franz-Keldysh oscillations in the nonlinear reflection spectra of heterostructures with InP self-assembled quantum dots. Average size of the quantum dots; Origin of the electric field manifested by the oscillations; Intrinsic defects on the dot interface.

  • Treatment of Inhomogeneous Radiation Broadening in Quantum Dot Heterostructures Described within the Framework of the Superradiation Model. Gordeev, N. Yu.; Zaıtsev, S. V.; Kopchatov, V. I.; Karachinskiı, L. Ya.; Novikov, I. I.; Ustinov, V. M.; Kop’ev, P. S. // Technical Physics Letters;Mar2000, Vol. 26 Issue 3, p259 

    Based on the simplest expressions of the theory of superradiation for a two-level system, a model is suggested to describe inhomogeneously broadened spectra of radiation from heterostructures with quantum dot. A 98% agreement between predicted and experimental spectra is demonstrated in the...

  • Multilayer Structures with Quantum Dots in the InAs/GaAs System Emitting at a Wavelength of 1.3μm. Tsyrlin, G. É.; Polyakov, N. K.; Egorov, V. A.; Petrov, V. N.; Volovik, B. V.; Sizov, D. S.; Tsatsul’nikov, A. F.; Ustinov, V. M. // Technical Physics Letters;May2000, Vol. 26 Issue 5, p423 

    The optical properties of multilayer structures with quantum dots in the heteroepitaxial InAs/GaAs system have been studied. The structures were obtained by the method of submonolayer migration-stimulated epitaxy. It is shown that the optimized growth conditions provide room-temperature...

  • Quantum dot lasers: the birth and future trends. Ledentsov, N. N. // Semiconductors;Sep99, Vol. 33 Issue 9, p946 

    Despite its early age, laser based on arrays of self-organized quantum dots modified all the basic commandments of the heterostructure laser. Excitonic gain mechanism and discrete energy spectrum in a quantum dot provide principally new ways to control optical properties of the media. Extension...

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