Abstract
| Original language | English |
|---|---|
| Journal | Physical Review E. Statistical, Nonlinear, and Soft Matter Physics |
| Volume | 49 |
| Issue number | 5 |
| Pages (from-to) | 4627-4636 |
| ISSN | 1063-651X |
| DOIs | |
| Publication status | Published - 1994 |
Bibliographical note
Copyright (1994) by the American Physical Society.Keywords
- ASSEMBLIES
- ENERGY-TRANSFER
- EXCITONS
- DECAY
Cite this
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Temperature effects in a nonlinear model of monolayer Scheibe aggregates. / Bang, Ole; Christiansen, Peter Leth; If, F.; Rasmussen, Kim; Gaididei, Y. B.
In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, Vol. 49, No. 5, 1994, p. 4627-4636.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Temperature effects in a nonlinear model of monolayer Scheibe aggregates
AU - Bang, Ole
AU - Christiansen, Peter Leth
AU - If, F.
AU - Rasmussen, Kim
AU - Gaididei, Y. B.
N1 - Copyright (1994) by the American Physical Society.
PY - 1994
Y1 - 1994
N2 - A nonlinear dynamical model of molecular monolayers arranged in Scheibe aggregates is derived from a proper Hamiltonian. Thermal fluctuations of the phonons are included. The resulting equation for the excitons is the two dimensional nonlinear Schrodinger equation with noise. Two limits of the complicated spectrum of the noise are considered: time independent, spatially white noise, simply corresponding to disorder in the arrangement of the molecules, and pure white noise. Parameter values are found by comparison with experiments by Mobius and Kuhn [Isr. J. Chem. 18, 375 (1979)] and order of magnitude estimates given where experiments are not available. The temperature dependent coherence time is found from numerical simulations. Experiments show that the excitons stay coherent during their life-time. This is in correspondence with the model at temperatures lower than 3 K. To increase this limiting temperature it is found that the dipole-dipole coupling and the exciton-phonon coupling must be decreased significantly.
AB - A nonlinear dynamical model of molecular monolayers arranged in Scheibe aggregates is derived from a proper Hamiltonian. Thermal fluctuations of the phonons are included. The resulting equation for the excitons is the two dimensional nonlinear Schrodinger equation with noise. Two limits of the complicated spectrum of the noise are considered: time independent, spatially white noise, simply corresponding to disorder in the arrangement of the molecules, and pure white noise. Parameter values are found by comparison with experiments by Mobius and Kuhn [Isr. J. Chem. 18, 375 (1979)] and order of magnitude estimates given where experiments are not available. The temperature dependent coherence time is found from numerical simulations. Experiments show that the excitons stay coherent during their life-time. This is in correspondence with the model at temperatures lower than 3 K. To increase this limiting temperature it is found that the dipole-dipole coupling and the exciton-phonon coupling must be decreased significantly.
KW - ASSEMBLIES
KW - ENERGY-TRANSFER
KW - EXCITONS
KW - DECAY
U2 - 10.1103/PhysRevE.49.4627
DO - 10.1103/PhysRevE.49.4627
M3 - Journal article
VL - 49
SP - 4627
EP - 4636
JO - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
SN - 2470-0045
IS - 5
ER -