Related Experiment Videos
Magnetochiral anisotropy in Bragg scattering.
C Koerdt1, G Düchs, G L J A Rikken
1Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung/CNRS, BP 166, 38042 Grenoble, France.
Physical Review Letters
|August 26, 2003
Summary
Light scattering in cholesteric liquid crystals exhibits magnetochiral anisotropy near Bragg resonance. Optical transmission linearly correlates with magnetic fields and medium handedness.
Area of Science:
- Physics
- Materials Science
Background:
- Cholesteric liquid crystals (CLCs) possess unique optical properties due to their helical structure.
- Magnetochiral anisotropy is a phenomenon where optical properties depend on the interplay of magnetic fields and chirality.
Purpose of the Study:
- To experimentally investigate magnetochiral anisotropy in CLCs.
- To explore the dependence of light scattering on external magnetic fields and medium handedness.
Main Methods:
- Experimental measurements of light scattering in CLCs.
- Application of external longitudinal magnetic fields.
- Analysis of optical transmission of unpolarized light.
Main Results:
- Observed strongly resonant magnetochiral anisotropy near the Bragg resonance.
- Demonstrated a linear dependence of optical transmission on the applied magnetic field.
- Confirmed the influence of the medium's handedness on the observed effect.
Conclusions:
- Cholesteric liquid crystals exhibit significant magnetochiral anisotropy under specific conditions.
- The findings provide insights into the interaction of light, magnetic fields, and chiral media.
- This research contributes to understanding advanced optical phenomena in liquid crystals.