24 February 2009 Stochastic models of exciton dynamics in a 4-μm long single air-suspended single-walled carbon nanotube
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Abstract
Optically excited single-walled carbon nanotube exciton dynamics are predicted using a stochastic model including linear and nonlinear decay pathways. Results are fitted to the photoluminescence behavior of a single 4-μm long airsuspended (9,8) single-walled carbon nanotube. Hard photoluminescence saturation is observed even with only a few excitons are present in the single-walled carbon nanotube. The absorption coefficient is estimated to be 0.01 - 0.04, and photoluminescence quantum efficiency is 13%. Femtosecond excitation correlation spectroscopy dynamics are consistent with linear and nonlinear (exciton-exciton annihilation) lifetimes of 80 ps and 0.8 ps respectively.
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Y.-F. Xiao, T. Q. Nhan, M. W. B. Wilson, James M. Fraser, "Stochastic models of exciton dynamics in a 4-μm long single air-suspended single-walled carbon nanotube", Proc. SPIE 7201, Laser Applications in Microelectronic and Optoelectronic Manufacturing VII, 720111 (24 February 2009); doi: 10.1117/12.809467; https://doi.org/10.1117/12.809467
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