Shaver, Jonah and Kono, Junichiro and Portugall, Oliver and Krstic, Vojislav and Rikken, Geert L. J. A. and Miyauchi, Yuhei and Maruyama, Shigeo and Perebeinos, Vasili (2007) Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking. NANO LETTERS, 7 (7). pp. 1851-1855.
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://pubs.acs.org/doi/abs/10.1021/nl070260f
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.
|Subjects:||Physical Science > Nano objects|
Physical Science > Quantum phenomena
|Deposited By:||Anuj Seth|
|Deposited On:||26 May 2009 13:48|
|Last Modified:||26 May 2009 13:48|
Repository Staff Only: item control page