Fig. 4
Schematic representation of the setup for a) PSSP and PSC, respectively, as well as for b) analysis of PSC. a The azo sample was treated by a DPSS-laser at λexc.=473 nm with either linear or circular polarization for PSSC and with elliptical polarization for PSC. Linear polarization was assured by a polarizer (P), circular and elliptical polarization by a quarter-waveplate. b The analysis of the supramolecular chiral structures was done by a self-made polarimeter consisting of a HeNe-laser at λ=633 nm, a polarizer P, quarter-waveplate, a rotatable analyzer A (around z-axis) and a diode detector, which detects the intensity EPL dependent on the position of A. The rotation of A was controlled by a computer with a self-written LabVIEW program, which also collects intensity data from detector