Light scattering on ultrathin capillaries
نویسنده
چکیده
In recent experiments, very low amplitudes of light scattering were reported for a tightly focused laser beam on a glass microcapillary. This result may be of great importance for single molecule detection in liquids. In the present paper, a theoretical study of the problem of light scattering of a focused laser beam on a cylindrical glass capillary is given. The numerical calculations are based on an exact electrodynamic treatment of the whole problem, including vector effects of the Ž electromagnetic field of the laser beam. It is shown that under favorite conditions inner and outer radius of the capillary, . perfect adjustment of the laser beam the intensity of the back-scattered light may be extremely low. q 1999 Elsevier Science B.V. All rights reserved. PACS: 87.64.N; 42.25.F
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