Nano Archive

Exciton dephasing and multiexciton recombinations in a single carbon nanotube

Matsuda, Kazunari and Inoue, Tadashi and Murakami, Yoichi and Maruyama, Shigeo and Kanemitsu, Yoshihiko (2008) Exciton dephasing and multiexciton recombinations in a single carbon nanotube. PHYSICAL REVIEW B, 77 (3).

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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.77.033406

Abstract

We studied the temperature and excitation intensity dependence of exciton luminescence in individual single-walled carbon nanotubes (SWNTs) using single nanotube photoluminescence (PL) spectroscopy. The linear temperature dependence of the PL linewidth in a single SWNT implies that the exciton dephasing is dominated by the interaction between the exciton and the phonon mode with very low energy under lower-excitation conditions. Saturation of the PL intensity and broadening of the PL linewidth in a single SWNT occur simultaneously with an increase in excitation laser intensity. Our findings show that the rapid exciton-exciton annihilation through multiparticle Auger recombination broadens the homogeneous PL linewidth.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
ID Code:566
Deposited By:IoN
Deposited On:20 Jan 2009 16:30
Last Modified:20 Jan 2009 16:30

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