Mechanism of exciton dephasing in a single carbon nanotube studied by photoluminescence spectroscopy

作者：Yoshikawa Kohei^*; Matsunaga Ryusuke; Matsuda Kazunari; Kanemitsu Yoshihiko

来源：Applied Physics Letters, 2009, 94(9): 093109.

DOI：10.1063/1.3089843

• carbon nanotubes
• phonon-exciton interactions
• photoluminescence

We studied the temperature and chirality dependence of the photoluminescence (PL) linewidth of single carbon nanotubes to clarify the mechanism of exciton dephasing. The PL linewidth of a single carbon nanotube broadened linearly with increasing temperature, indicating that the linewidth and exciton dephasing are determined through exciton-phonon interactions. From the chirality dependence of the PL linewidth, we concluded that exciton dephasing is caused by both the longitudinal acoustic and twisting phonon modes.

• 出版日期2009-3-2