Spherical particles in the size range of micrometers are excellent resonators for visible light. The elastically (Mie) as well as inelastically (Raman) scattered light is significantly dominated by this property, which leads to so-called morphology dependent resonances (MDRs) in both types of light scattering mechanisms.

The lecture first describes the various ways of trapping single microparticles free in space. Then, applications of combined Raman/Mie scattering from single microdroplets are discussed. This includes evaporation studies, phase transitions, acid/base reactions and polymerization in a single microdroplet. Finally, stimulated Raman scattering from and femtosecond pulse excitation experiments on single microdroplets are described. To interpret the observed femtosecond-Mie spectra, a time-dependent Mie-theory had to be developed.

The work presented had been performed in the author’s former laboratories by my former co-workers M. Lankers, J. Musick, J. Popp, V.E. Roman, O. Sbanski, K. Schaschek, S. Schlücker, T. Siebert, and M. Trunk to whom I am most thankful.

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1. Raman-Mie scattering from spherical microparticles