@article{Tan-2007-PRL, doi = {10.1103/PhysRevLett.99.137402}, year = {2007}, volume = {99}, pages = {137402}, author = {Tan, P. H. and Rozhin, A. G. and Hasan, T. and Hu, P. and Scardaci, V. and Milne, W. I. and Ferrari, A. C.}, title = {Photoluminescence spectroscopy of carbon nanotube bundles: {E}vidence for exciton energy transfer}, journal = {Phys. Rev. Lett.} }