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- W2170741790 abstract "Abstract We report the relaxation times of electronic and vibrational coherence in the cyanine dye 1,1′,3,3,3′,3′‐hexamethyl‐4,4′,5,5′‐dibenzo‐2,2′‐indotricarbocyanine, measured using a 7.1 fs pulsed laser. The vibrational phase relaxation times are found to be between 380 and 680 fs in the ground and lowest excited singlet states. The vibrational dephasing times of the 294, 446, and 736 cm −1 modes are relatively long among the six modes associated with excited‐state wave packets. The slower relaxations are explained in terms of a coupled triplet of vibrational modes, which preserves coherence by forming a tightly bound group to satisfy the condition of circa conservation of vibrational energy. Using data from the negative‐time range (i.e., when the probe pulse precedes the pump pulse), the electronic phase relaxation time is found to be 31±1 fs. The dynamic vibrational mode in the excited state (1171 cm −1 ), detected in the positive‐time range, is also studied from the negative‐time traces under the same experimental conditions." @default.
- W2170741790 created "2016-06-24" @default.
- W2170741790 creator A5014040565 @default.
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- W2170741790 date "2010-03-08" @default.
- W2170741790 modified "2023-10-12" @default.
- W2170741790 title "Electronic and Vibrational Coherence Dynamics in a Cyanine Dye Studied Using a Few-Cycle Pulsed Laser" @default.
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- W2170741790 doi "https://doi.org/10.1002/cphc.200900784" @default.
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