Abstract

We present an analytical model for describing optical third-harmonic generation from a sphere that is small compared with the wavelength of light. Analysis of the problem shows that the power of the third harmonic from a sphere that is small compared with the waist size and the confocal parameter of the beam is proportional to the fourth power of a sphere’s size. Experiments with different spheres both in index-matching and non-index-matching liquids are performed and confirm theoretical predictions.

© 2005 Optical Society of America

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