ABSTRACT
When a dye with geometric anisotropy is dissolved in a liquid crystal the dye molecules tend to arrange in such a way that their long molecular axes align along the LC director, n → https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781351071369/28a6db10-a18b-4599-a6f8-fe2f7d73e455/content/inequ1_1.tif"/> (the direction of the predominant orientation of the LC long molecular axes). One of the main criteria of the DD eff iciency is the degree of ordering (or, in other words, the order parameter), S, of the long-wave electron transition oscillator (LETO), responsible for the color of the dye, with respect to n → https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781351071369/28a6db10-a18b-4599-a6f8-fe2f7d73e455/content/inequ1_1.tif"/> . S can be easily found from the electron polarization spectra of the DD solution in LC using the following formula:
