Figure 4

Schematic presentation of an optical tweezer (a), optical force from the view point of optical rays (b, c), using the combination of optical trapping and nanojets for optically scanning samples on the surface of substrate (f) and the near-field distribution of the square of electric field density of a glass sphere (n=1.5) in water (n=1.33) with radius R=800 nm scattering light λ=500 nm (d) and the distribution of |E|² along the dotted lines in (d) with E_max²=16E₀² (e).