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Fig. 3. (Color online) Scattering-intensity map of a single PS bead with a diameter of 700 nm. (a–b) Measurement by balanced detection with lock-in amplifiers (a) and that by the simple difference method (b). The scanning area was 6 × 6 μm with a spatial step of 0.3 μm in the x- and y-directions. The white dashed circles indicate the measured single particle.
New Phys.: Sae Mulli 2023;73:156~159