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 journalArticlepeer-review

40 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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