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We report a femtosecond transient absorption spectroscopic study on the (6, 5) single-walled carbon nanotubes and the (7, 5) inner tubes of a dominant double-walled carbon nanotube species. We found that the dynamics of exciton relaxation probed at the first transition-allowed state (E(11)) of a given tube type exhibits a markedly slower decay when the(More)
Highly nonlinear pump fluence dependence was observed in the ultrafast one-color pump-probe responses excited by 38 fs pulses resonant with the E(22) transition in a room-temperature solution of (6,5) carbon nanotubes. The differential probe transmission (ΔT/T) at the peak of the pump-probe response (τ = 20 fs) was measured for pump fluences from ∼10(13) to(More)
Application of 2D Fourier transform electronic spectroscopy to semiconducting SWNTs is demonstrated to decongest complex exciton dynamics. Analysis provides the E 22 homogeneous linewidth, and elucidates the roles of vibrational and multi-exciton states in population relaxation. 1. Introduction In contrast to the established electrical and mechanical(More)
Correlated ultrafast photoconductive and absorptive response in WSe 2 show interlayer charge transfer determines device efficiency " in prep. (2015) " Tunable optical excitations in twisted bilayer graphene form strongly bound excitons " Nano Letters, 15, 5032 (2013) " Transient absorption and photocurrent microscopy show hot electron supercollisions(More)
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