Dynamics and Coherent Control of Exciton-Exciton Annihilation in Aqueous J-Aggregate
(2018) In The Journal of Physical Chemistry Part B 122(47). p.10746-10753- Abstract
In aqueous solution of 1,1'-diethyl-2,2'-carbocyanine J-aggregate, the exciton self-trapped (EST) state is usually expected to be negligible. However, in this work, by measuring transient absorption spectroscopy under a variety of excitation fluences, the EST state was found to be formed via coherent exciton-exciton annihilation (EEA), when the excitation fluence was high enough. With the existence of a shoulder-stimulated emission band at 615 nm and a broad EST state absorption band at long wavelength, diffusion-limited and coherent EEAs can be distinguished. Adaptive coherent control was employed to check if EEA dynamics can be influenced by a shaped excitation pulse. We found that both the diffusion-limited and coherent EEAs can be... (More)
In aqueous solution of 1,1'-diethyl-2,2'-carbocyanine J-aggregate, the exciton self-trapped (EST) state is usually expected to be negligible. However, in this work, by measuring transient absorption spectroscopy under a variety of excitation fluences, the EST state was found to be formed via coherent exciton-exciton annihilation (EEA), when the excitation fluence was high enough. With the existence of a shoulder-stimulated emission band at 615 nm and a broad EST state absorption band at long wavelength, diffusion-limited and coherent EEAs can be distinguished. Adaptive coherent control was employed to check if EEA dynamics can be influenced by a shaped excitation pulse. We found that both the diffusion-limited and coherent EEAs can be suppressed. Ground-state vibronic coupling and non-Condon-type exciton-phonon coupling were discussed to explain the observations.
(Less)
- author
- Ma, Fei LU
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part B
- volume
- 122
- issue
- 47
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:30395710
- scopus:85057571449
- ISSN
- 1520-5207
- DOI
- 10.1021/acs.jpcb.8b09891
- language
- English
- LU publication?
- yes
- id
- bda64d03-1d15-4c71-bc8d-a880a4d4b328
- date added to LUP
- 2018-12-10 14:23:06
- date last changed
- 2024-04-01 17:30:08
@article{bda64d03-1d15-4c71-bc8d-a880a4d4b328,
abstract = {{<p>In aqueous solution of 1,1'-diethyl-2,2'-carbocyanine J-aggregate, the exciton self-trapped (EST) state is usually expected to be negligible. However, in this work, by measuring transient absorption spectroscopy under a variety of excitation fluences, the EST state was found to be formed via coherent exciton-exciton annihilation (EEA), when the excitation fluence was high enough. With the existence of a shoulder-stimulated emission band at 615 nm and a broad EST state absorption band at long wavelength, diffusion-limited and coherent EEAs can be distinguished. Adaptive coherent control was employed to check if EEA dynamics can be influenced by a shaped excitation pulse. We found that both the diffusion-limited and coherent EEAs can be suppressed. Ground-state vibronic coupling and non-Condon-type exciton-phonon coupling were discussed to explain the observations.</p>}},
author = {{Ma, Fei}},
issn = {{1520-5207}},
language = {{eng}},
number = {{47}},
pages = {{10746--10753}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Part B}},
title = {{Dynamics and Coherent Control of Exciton-Exciton Annihilation in Aqueous J-Aggregate}},
url = {{http://dx.doi.org/10.1021/acs.jpcb.8b09891}},
doi = {{10.1021/acs.jpcb.8b09891}},
volume = {{122}},
year = {{2018}},
}