Abstract
The picosecond time-resolved emission spectrum of the cyanine dye 1,1′-diethyl-3,3′bis-(3-sulfopropyl)-5,5′,6,6′-tetrachlorobenzimidazolocarbocyanine (also known as BIC) adsorbed onto colloidal silver was examined as a function of laser pulse energy at room temperature. BIC is found to aggregate on colloidal silver, and the number of coherently responding molecules involved in the one-exciton state (i.e., the coherence length) was estimated to involve 8–9 molecules. Lasing at a remarkably low incident pulse energy threshold was found for this system and explained in terms of a mechanism involving superradiant states created in coherently coupled adsorbed molecules that emit photons which stimulate emission from other spatially distributed superradiant states.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 9:31 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 3, 2024, 10:05 a.m.) |
Indexed | 1 year, 6 months ago (Feb. 11, 2024, 6:40 a.m.) |
Issued | 26 years, 10 months ago (Oct. 5, 1998) |
Published | 26 years, 10 months ago (Oct. 5, 1998) |
Published Print | 26 years, 10 months ago (Oct. 5, 1998) |
@article{_z_elik_1998, title={Superradiant lasing from J-aggregated molecules adsorbed onto colloidal silver}, volume={73}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.122563}, DOI={10.1063/1.122563}, number={14}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Özçelik, Serdar and Özçelik, Isin and Akins, Daniel L.}, year={1998}, month=oct, pages={1949–1951} }