Fig. 4
From: One-Drop Self-Assembly of Ultra-Fine Second-Order Organic Nonlinear Optical Crystal Nanowires
a The SHG microscopy setup, where L is a lens, OL is an objective lens, DM is a dichroic mirror, GM is a galvanometer mirror, P is a polarizer, HWP is a half-wavelength polarizer, QWP is a quarter-wavelength polarizer, BPF is a band-pass filter, and PMT is a photomultiplier tube. The inset is a typical plot of the SHG intensity of a NW as a function of the incident laser polarization angle, where the red dots indicate the experimental data, and the solid blue lines represent theoretical fits. b SHG image of DAST NWs and their orientation angles, the field size is 170 x 170 μm