Pyrene fluorescence dynamics within a polymer microspherical cavity

Hideki Fujiwara*, Keiji Sasaki, Hiroshi Masuhara

*此作品的通信作者

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

Drastic changes of fluorescence dynamics in pyrene-doped poly(methylmethacrylate) latex microspheres were observed with a time-resolved microspectroscopy system. Fluorescence decay curves of pyrene monomer emission from the microspheres consist of fast and slow decay components. Rate constants of the slow components are almost the same for all particles, which correspond to the value in free space. The fast components increase in the relative intensity and in the decay rate with decreasing particle size, which can be ascribed to cavity-enhanced spontaneous emission. The rate constant for a 2.4 μm sphere is increased by a factor of ∼17 compared to the bulk value. The results are discussed on the basis of the cavity quantum electrodynamic theory.

原文English
頁(從 - 到)2052-2056
頁數5
期刊Journal of Applied Physics
85
發行號4
DOIs
出版狀態Published - 15 二月 1999

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