Vol. 23, issue 12, article # 12

Geints Yu.E., Zemlyanov A.A., Panina E.K. Modeling of multiphoton-excited fluorescence from spherical droplet irradiated by an ultrashort laser radiation, using the method of computation electrodynamics. // Optika Atmosfery i Okeana. 2010. V. 23. No. 12. P. 1120-1126 [in Russian].
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On the basis of a FDTD-technique to the solution of the Maxwell equations the numerical modeling of two-dimensional spatial field distribution of multi-photon excited fluorescence in the vicinity of a micron spherical ethanol droplet upon illumination by laser beam was carried out. It is considered that fluorescence sources are located in "hot spots" in a spherical particle and can have various capacity and volume. It is established that the field of fluorescence radiated from back and forward hemispheres of a particle (in relation to a direction of exciting radiation), is characterized by a various orientation. With the increase of multi-photon order of the excitation of fluorescence from ethanol droplet and corresponding increase in a disbalance between sources capacity, the fluorescence is emitted primarily in the "forward" direction; the effective angular divergence of fluorescence in the "backward" direction changes insignificantly.


multi-photon excited fluorescence, spherical particle, angular divergence