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Scheme of the measurements of MDR modes with a plane wave (a) and focused beam incidence (b). The sketch (b) shows the beam polarization direction and the three focused beam position of the Ti:Sapphire laser for a point of view of the axis.
He–Ne backscattering intensity spectra, experimental (top) and theoretical (bottom), showing the MDR modes for a dielectric sphere excited by a plane wave. The experimental data scale is on the left and the theoretical calculation scale is on the right.
Experimental (bottom) and theoretical (top) spectra showing the MDR modes of a dielectric sphere in a focused beam. Modes for the sphere moving parallel to the incident beam polarization, TM modes (a), perpendicular to the incident beam polarization, TE modes (b) and at 45° of the beam polarization, TM and TE modes (c).
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