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.

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收藏

页码：2044 / 2049

页数：6

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