Figure 1

(Color online) (a) Experimental setup for angle-resolved SH light scattering measurements. AP: aperture, BP: bandpass filter, FL: focusing lens, HW: half-wave plate, LP: longpass filter, P: polarizer, PMT: photomultiplier tube, and SP: shortpass filter. (b) Negatively charged colloidal particle with an interfacial layer of oriented water molecules.Reuse & Permissions

Figure 2

(Color online) Angular distribution of the SH scattered light. (a) SH scattering profiles from pure water and 200 nm polystyrene particles in water in $pp$ and $sp$ polarization configuration. The $ss$ polarization configuration of water is used to correct for the angle-dependent sampling volume. The dashed lines are smoothed splines to the experimental data. (b) SH intensities from bare particles. The profiles were corrected by the angle-dependent sampling volume and the SH signal of pure water. The solid lines correspond to a simulation with the nonlinear Mie model with ${\chi }_{zzz}^{\left(2\right)}=1$, ${\chi }_{xxz}^{\left(2\right)}=0$, and ${\chi }_{zxx}^{\left(2\right)}=0.1$. The intensities of the simulated $pp$ and $sp$ profiles are scaled by the same factor to preserve the simulated intensity ratio.Reuse & Permissions

Figure 3

(Color online) (a) Size dependency of SHLS for pure ${\chi }_{zzz}^{\left(2\right)}$ contribution using the NLRGD with the refractive index of water and the NLMie model. (b) Dependence of the position of the maximum in $pp$ and $sp$ polarization and the intensity ratio on the composition of the surface susceptibility. The comparison of the simulated (triangular color/grayscale plots) and the experimental values (areas framed by bold lines) is used to determine the ratio of the surface susceptibility elements.Reuse & Permissions

Figure 4

(Color online) (a) Corrected SH scattering profiles in $pp$ polarization configuration from charged 200 nm polystyrene particles in water at different NaCl concentrations (open symbols). The simulated scattering profiles (solid lines) are scaled to fit the experimental data. (b) Dependence of the overall SH intensity on the electrolyte concentration.Reuse & Permissions