Wave function engineering in elongated semiconductor nanocrystals with heterogeneous carrier confinement

被引：207
作者：
Müller, J
Lupton, JM
Lagoudakis, PG
Schindler, F
Koeppe, R
Rogach, AL
Feldmann, J
Talapin, DV
Weller, H
机构：
[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany
[2] Univ Munich, CeNS, D-80799 Munich, Germany
[3] Univ Hamburg, Inst Chem Phys, D-20146 Hamburg, Germany
来源：
NANO LETTERS | 2005年 / 5卷 / 10期
关键词：
D O I：
10.1021/nl051596x
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying the aspect ratio of the nanoparticle allows control over the electron-hole overlap (radiative rate), and external electric fields manipulate the interaction between the delocalized electron and the localized hole. In agreement with theory, this leads to an exceptional size dependent quantum confined Stark effect with field induced intensity modulations, opening applications as electrically switchable single photon sources.
引用
收藏
页码：2044 / 2049
页数：6
相关论文
共 30 条
  • [1] Stark-shift modulation absorption spectroscopy of single quantum dots
    Alén, B
    Bickel, F
    Karrai, K
    Warburton, RJ
    Petroff, PM
    [J]. APPLIED PHYSICS LETTERS, 2003, 83 (11) : 2235 - 2237
  • [2] Semiconductor clusters, nanocrystals, and quantum dots
    Alivisatos, AP
    [J]. SCIENCE, 1996, 271 (5251) : 933 - 937
  • [3] VARIATIONAL CALCULATIONS ON A QUANTUM WELL IN AN ELECTRIC-FIELD
    BASTARD, G
    MENDEZ, EE
    CHANG, LL
    ESAKI, L
    [J]. PHYSICAL REVIEW B, 1983, 28 (06): : 3241 - 3245
  • [4] ELECTRON ELECTRON AND ELECTRON-HOLE INTERACTIONS IN SMALL SEMICONDUCTOR CRYSTALLITES - THE SIZE DEPENDENCE OF THE LOWEST EXCITED ELECTRONIC STATE
    BRUS, LE
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (09) : 4403 - 4409
  • [5] Fluorescence quantum yield of CdSe/ZnS nanocrystals investigated by correlated atomic-force and single-particle fluorescence microscopy
    Ebenstein, Y
    Mokari, T
    Banin, U
    [J]. APPLIED PHYSICS LETTERS, 2002, 80 (21) : 4033 - 4035
  • [6] Empedocles SA, 1999, ADV MATER, V11, P1243, DOI 10.1002/(SICI)1521-4095(199910)11:15<1243::AID-ADMA1243>3.0.CO
  • [7] 2-2
  • [8] Influence of spectral diffusion on the line shapes of single CdSe nanocrystallite quantum dots
    Empedocles, SA
    Bawendi, MG
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (11): : 1826 - 1830
  • [9] Quantum-confined stark effect in single CdSe nanocrystallite quantum dots
    Empedocles, SA
    Bawendi, MG
    [J]. SCIENCE, 1997, 278 (5346) : 2114 - 2117
  • [10] Emission of a single conjugated polymer chain isolated in its single crystal monomer matrix -: art. no. 087401
    Guillet, T
    Berréhar, J
    Grousson, R
    Kovensky, J
    Lapersonne-Meyer, C
    Schott, M
    Voliotis, V
    [J]. PHYSICAL REVIEW LETTERS, 2001, 87 (08) : 874011 - 874014
123