Exciton-exciton annihilation in organic polariton microcavities
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PhysRevB.82.113106.pdf
Description
Published version
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150.09 KB
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Author(s)
Akselrod, Gleb Markovitch
Tischler, Y. R.
Young, Elizabeth R.
Nocera, Daniel G.
Bulovic, Vladimir
Date Issued
September 27, 2010
Publisher
American Physical Society (APS)
Citation
Akselrod, G. M., Tischler, Y. R., Young, E. R., Nocera, D. G. and Bulovic, V. 2010. "Exciton-exciton annihilation in organic polariton microcavities." 82 (11).
Version
Final published version
Abstract
We investigate the incoherent diffusion of excitons in thin films (5.1±0.1nm thick) of a highly absorbing J-aggregated cyanine dye material (106 cm-1 absorption constant) as the excitonic component of a polariton microcavity. Under high-intensity pulsed laser excitation, the J-aggregated molecular films exhibit significant exciton-exciton annihilation, indicating a large exciton diffusion radius of more than 100 nm. When the material is strongly coupled to a cavity, the polaritonic structure also shows exciton-exciton annihilation, which is a competing process against the establishment of a threshold population of polaritons needed for polariton lasing. This study suggests that exciton-exciton annihilation is a loss process which can significantly increase the lasing threshold in polariton microcavities. © 2010 The American Physical Society.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1103/physrevb.82.113106
