750
(Invited) Photoluminescence from an Individual Double-Walled Carbon Nanotube

Thursday, 17 May 2018: 15:20
Room 205 (Washington State Convention Center)
T. Michel (Laboratoire Charles Coulomb), D. Levshov (Laboratoire Charles Coulomb, Faculty of Physics, Southern Federal University, Russia), M. Paillet (Laboratoire Charles Coulomb), R. Arenal (Instituto de Nanociencia de Aragón, ARAID Fundation), V. Popov (Faculty of Physics, University of Sofia, Bulgaria), R. Parret (Laboratoire Charles Coulomb), C. Nguyenvan (Institute of Materials Science, VAST), S. Rochal (Faculty of Physics, Southern Federal University, Russia), A. Zahab, and J. L. Sauvajol (Laboratoire Charles Coulomb)
In this communication, we report direct and unambiguous evidence of the existence of inner semiconducting tube photoluminescence (PL) from measurements performed on four individual freestanding index-identified double-walled carbon nanotubes (DWNTs). Based on thorough Rayleigh scattering, Raman scattering, and PL experiments, we are able to demonstrate that the inner semiconducting tube PL is observed with a quantum yield estimated to be a few 10-6 independent of the semiconducting or metallic nature of the outer tube. This result is mainly attributed to ultrafast exciton transfer from the inner to outer tube. Furthermore, by carrying out PL excitation experiments on the (14,1)@(15,12) DWNT, we show that the inner semiconducting tube PL can be detected through the optical excitation of the outer tube, indicating that the exciton transfer can also occur in the opposite way.