Exciton-photon coupling in organic materials with large intersystem crossing rates and strong excited-state molecular relaxation - art. no. 2352030

被引:32
作者
Holmes, RJ [1 ]
Forrest, SR [1 ]
机构
[1] Princeton Univ, Dept Elect Engn, PRISM, Princeton, NJ 08544 USA
关键词
D O I
10.1103/PhysRevB.71.235203
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We examine the influence of singlet-triplet intersystem crossing (ISC) and excited-state molecular relaxation on strong exciton-photon coupling in optical microcavities filled with small-molecular-weight organic materials. The effect of ISC is considered by comparing coupling effects in the phosphorescent organic platinum(II) octaethylporphyrin to those in the fluorescent free-base porphyrin tetraphenylporphyrin (TPP). The influence of excited-state molecular relaxation is studied by examining coupling to the Soret band of TPP. Both ISC and excited-state molecular relaxation prevent the population of polariton states under nonresonant optical excitation. The interplay between strong coupling and relaxation processes offers a unique opportunity to directly probe fundamental ultrafast excitonic phenomena. The competition between coupling in microcavities and these processes allows for estimation of their relative transition rates.
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页数:9
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