Magnetic Brightening of Carbon Nanotube Photoluminescence Through Symmetry Breaking

Overview

Journal Nano Lett

Publisher American Chemical Society

Specialty Biotechnology

Date 2007 Jun 5

PMID 17542638

Citations 10

Authors

Jonah Shaver

Junichiro Kono

Oliver Portugall

Vojislav Krstic

Geert L J A Rikken

Yuhei Miyauchi

Shigeo Maruyama

Vasili Perebeinos

Affiliations

Soon will be listed here.

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.

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