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

C. Mauser, T. Limmer, E. Da Como, K. Becker, A. Rogach, J. Feldmann, D. Talapin

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)153303-153307
JournalPhysical Review B
Volume77
Issue number15
DOIs
Publication statusPublished - 2008

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