Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1804909 | Journal of Magnetism and Magnetic Materials | 2006 | 5 Pages |
Abstract
Homeotropically aligned nematic liquid crystals doped with azo-dye were subjected both to a linear polarized light of a He-Ne laser and to a magnetic field perpendicular to the incident light beam. We found that the emerging light was elliptically polarized when using magnetic field strengths higher than the threshold value for the magnetic Freedericksz transition. The light transmission, the rotatory power (induced by azo-dye) and the ellipticity varied quasiperiodically when increasing magnetic field strength. The number and positions of maxima and minima depend on the cell thicknesses. Changes in the phase difference between the emergent ordinary and extraordinary rays were computed from the experimental data and the magnetic field dependence of the birefringence was determined.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Cornelia Motoc, Gabriela Iacobescu,