Electrogyration in CHBrClF chromophores stimulated by circularly polarized light

We have found that the CHBrClF chiral-like racemic molecule incorporated into oligoetheracrylate photopolymer matrices demonstrates considerable photoinduced linear electrogyration (EG) caused by circularly polarized bicolour coherent light. The maximally achieved value of the EG, described by the third-order axial tensor for the circularly polarized light of the probe at a wavelength of 633 nm, was equal to about 12°mm−1 at an applied electric field strength equal to 250 V cm−1. We have established that the maximal EG coefficient is achieved for 5.10 wt% of CHBrClF chromophores. The investigated composites possess a long-lived screw-like helicoidal EG decreasing less than 18% after laser treatment for 100 min by the circularly polarized coherent frequencies of an ND-doped yattric aluminium garnet laser. Application of non-circular pump light leads to a decrease in the observed EG.