Anisotropic optical emission of single CdSe/CdS tetrapod heterostructures: Evidence for a wavefunction symmetry breaking

被引：46

作者：

Mauser, C. ^{[1
,2
]}

Limmer, T. ^{[1
,2
]}

Da Como, E. ^{[1
,2
]}

Becker, K. ^{[1
,2
]}

Rogach, A. L. ^{[1
,2
]}

Feldmann, J. ^{[1
,2
]}

Talapin, D. V. ^{[1
,2
,3
]}

机构：

[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[2] Univ Munich, CeNS, D-80799 Munich, Germany

[3] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.77.153303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Semiconductor tetrapods are expected to exhibit isotropic optical properties due to their tetrahedral symmetry. We have investigated the optical polarization properties of individual CdSe/CdS tetrapods of high structural quality. In contrast to the light absorption behavior, a pronounced anisotropy is observed in the optical emission. This unexpected result can only be explained by assuming a symmetry breaking in the electronic wavefunction. Calculations reveal that slight differences between the arm diameters induce the polarized emission and a decrease in the photoluminescence intensity.

引用

页数：4

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