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Physical Review B - Condensed Matter and Materials Physics
Volumn 81, Issue 24, 2010, Pages
Comparison of transient grating signals from spheroidene in an organic solvent and in pigment-protein complexes from Rhodobacter sphaeroides 2.4.1
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EID: 77956304252     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.81.245112     Document Type: Article
Times cited : (21)
References (96)
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    • Liu, L.N.1    Aartsma, T.J.2    Frese, R.N.3
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    • The interference between the coherent oscillations in the excited and ground states can also cause the spectral shift. In the present case, the decay from S2 to Sx is very fast as shown in Fig. that corresponds to a few oscillation periods. Further since this is a stochastic process the memory of the coherent oscillations in the excited state is lost in this internal-conversion process. Therefore the coherent coupling between the oscillations in the excited and ground states is less plausible in the present case since the observed spectral shift is a picosecond range
    • The interference between the coherent oscillations in the excited and ground states can also cause the spectral shift. In the present case, the decay from S 2 to S x is very fast as shown in Fig. that corresponds to a few oscillation periods. Further since this is a stochastic process the memory of the coherent oscillations in the excited state is lost in this internal-conversion process. Therefore the coherent coupling between the oscillations in the excited and ground states is less plausible in the present case since the observed spectral shift is a picosecond range.
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    • x should be an electronic level. For more details, see Ref.16
    • x should be an electronic level. For more details, see Ref.16.
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    • -1
    • -1.
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    • in Lecture Notes in Physics, edited by M. A. L. Marques, C. A. Ullrich, F. Nogueira, A. Rubio, K. Burke, and E. K. U. Gross (Springer-Verlag, Berlin, 10.1007/3-540-35426-3-7
    • S. Mukamel, A. E. Cohen, and U. Harbola, in Time-Dependent Density Functional Theory, Lecture Notes in Physics, edited by, M. A. L. Marques, C. A. Ullrich, F. Nogueira, A. Rubio, K. Burke and, E. K. U. Gross, (Springer-Verlag, Berlin, 2006), . 107. 10.1007/3-540-35426-3-7
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    • We have also calculated the TG signals assuming only the S2 and S1 states, namely, Sx is eliminated. However, a good agreement was not attained (result is not shown).
    • We have also calculated the TG signals assuming only the S 2 and S 1 states, namely, S x is eliminated. However, a good agreement was not attained (result is not shown).
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    • The decay times shown in Fig. are slightly faster than the vibronic decoherence times obtained by the calculations. This is because the decay times in Fig. reflect both the electronic and vibronic decays.
    • The decay times shown in Fig. are slightly faster than the vibronic decoherence times obtained by the calculations. This is because the decay times in Fig. reflect both the electronic and vibronic decays.
  • 96
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    • The branching ratio between S1 → S0 and S1 → Qy can be obtained from the percentage composition of the internal-conversion rates, i.e., Γ10 : Γ1 Qy =22%:78%, which is very close to the results obtained in the previous reports (Refs.). Since these pathways have an error of ±0.5 ps, the branching ratio varies ±5%. The efficiency of the excitation energy transfer is then given by the product of the inflow from the upper singlet state Sx and the percentage composition of the S1 → S0 pathway. Therefore, the efficiency significantly depends on the lifetime of the upper singlet state
    • The branching ratio between S 1 → S 0 and S 1 → Q y can be obtained from the percentage composition of the internal-conversion rates, i.e., Γ 10: Γ 1 Q y = 22 %: 78 %, which is very close to the results obtained in the previous reports (Refs.). Since these pathways have an error of ± 0.5 ps, the branching ratio varies ± 5 %. The efficiency of the excitation energy transfer is then given by the product of the inflow from the upper singlet state S x and the percentage composition of the S 1 → S 0 pathway. Therefore, the efficiency significantly depends on the lifetime of the upper singlet state.

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