dorsal/arxiv
View SchemaSpontaneous emission of homogeneous broadening molecules on a micro-droplet's surface and local-field correction
| Authors | Yun-Jie Xia, Guang-Can Guo, P. T. Leung |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402029 |
| URL | https://arxiv.org/abs/quant-ph/0402029 |
Abstract
We consider the spontaneous emission of a broadening molecule on the surface of a micro-sphere in this paper. The density of states for the micro-cavity is derived from quasi-normal models(QNM's) expansion of the correlation functions of electromagnetic fields. Through detailed analysis we show that only weak coupling between a broadening atom(molecule) and the electromagnetic fields exists in a dielectric sphere cavity whether the sphere is small or big. From these results we find the explicit expression of the spontaneous emission decay rate for a surfactant broadening molecule on the surface of a micro-droplet with radius $a$, in which only $1/a$ and $1/a^{2}$ components exhibit. Then we apply this expression to a real experiment and obtain a consistent result with the experiment. We also show that the real-cavity model of local field correction is accurate, and reveal that the local-field correction factor can be measured precisely and easily by fluorescence experiments of surfactant molecules. Moreover, the spontaneous decay of a surfactant molecular on droplet's surface is sensitive to the atomic broadening, so that the fluorescence experiment in a micro-sphere cavity can be used to estimate the radiative broadening.
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"abstract": "We consider the spontaneous emission of a broadening molecule on the surface\nof a micro-sphere in this paper. The density of states for the micro-cavity is\nderived from quasi-normal models(QNM\u0027s) expansion of the correlation functions\nof electromagnetic fields. Through detailed analysis we show that only weak\ncoupling between a broadening atom(molecule) and the electromagnetic fields\nexists in a dielectric sphere cavity whether the sphere is small or big. From\nthese results we find the explicit expression of the spontaneous emission decay\nrate for a surfactant broadening molecule on the surface of a micro-droplet\nwith radius $a$, in which only $1/a$ and $1/a^{2}$ components exhibit. Then we\napply this expression to a real experiment and obtain a consistent result with\nthe experiment. We also show that the real-cavity model of local field\ncorrection is accurate, and reveal that the local-field correction factor can\nbe measured precisely and easily by fluorescence experiments of surfactant\nmolecules. Moreover, the spontaneous decay of a surfactant molecular on\ndroplet\u0027s surface is sensitive to the atomic broadening, so that the\nfluorescence experiment in a micro-sphere cavity can be used to estimate the\nradiative broadening.",
"arxiv_id": "quant-ph/0402029",
"authors": [
"Yun-Jie Xia",
"Guang-Can Guo",
"P. T. Leung"
],
"categories": [
"quant-ph"
],
"title": "Spontaneous emission of homogeneous broadening molecules on a micro-droplet\u0027s surface and local-field correction",
"url": "https://arxiv.org/abs/quant-ph/0402029"
},
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