Photorefractive Bragg gratings with Q≤1 are investigated using magnetic field alignment techniques in low-molar-mass nematic liquid crystals doped with electron donor and acceptor molecules. The alignment involves a 0.3 T magnetic field which produces thicker homeotropic samples than traditional surfactant techniques. Low applied voltage and low optical intensity requirements of nematic liquid crystals are maintained while achieving photorefractive grating Bragg diffraction characteristics.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)