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Science 18 April 1969:
Vol. 164. no. 3877, pp. 301 - 302
DOI: 10.1126/science.164.3877.301
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Articles

Mode-Locked Lasers: Measurements of Very Fast Radiative Decay in Fluorescent Systems

H. Merkelo 1, S. R. Hartman 1, T. Mar 2, and G. S. Singhal Govindjee 2

1 Department of Electrical Engineering, University of Illinois, Urbana 61801
2 Department of Botany

A mnode-locked laser was used to measure fluorescence decay down to 80 picoseconds. Measurements on the fluorescence of methylene blue quenchled with potassium iodide demonstrate the effectiveness of the method. Fluorescence decay times of chlorophyll b (3.87 ± 0.05 nianoseconds) and c-phycocyanin (1.14 ± 0.01 nanoseconds) in vitro and chlorophyll a in the green alga Chlorella pyrenoidosa (1.14 to 1.6 nanoseconds) compare well with some of the existing data.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Intensity Dependence of the Fluorescence Lifetime of in vivo Chlorophyll Excited by a Picosecond Light Pulse.
A. J. CAMPILLO, V. H. KOLLMAN, and S. L. SHAPIRO (1976)
Science 193, 227-229
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Science. ISSN 0036-8075 (print), 1095-9203 (online)