Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking

Jonah Shaver, Junichiro Kono, Oliver Portugall, Vojislav Krstic̀, Geert L.J.A. Rikken, Yuhei Miyauchi, Shigeo Maruyama, Vasili Perebeinos

Research output: Contribution to journalArticlepeer-review

110 Scopus citations

Abstract

We report that symmetry breaking by a magnetic field can drastically increase the photoluminescence quantum yield of single-walled carbon nanotubes, by as much as a factor of 6, at low temperatures. To explain this we have developed a theoretical model based on field-dependent exciton band structure and the interplay of Coulomb interactions and the Aharonov-Bohm effect. This conclusively explains our data as the first experimental observation of dark excitons 5-10 meV below the bright excitons.

Original languageEnglish (US)
Pages (from-to)1851-1855
Number of pages5
JournalNano letters
Volume7
Issue number7
DOIs
StatePublished - Jul 2007

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