Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
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. © 2007 American Chemical Society.
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
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Journal of Rheology
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SPIE AeroSense 1997
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