We have observed enhanced photorefractive responses in CdSe doped nematic liquid crystal cells. The effective intensity dependent refractive index coefficients are on the order of 10 -2 cm 2 /Watt. Using polymer-dispersed mixture of these NLC, 3-D photonic crystals are fabricated by short-exposure direct holographic optical illumination. The resultant structure exhibits 3-D photonic crystal Bragg diffraction and multi-color reflections that can be electronically switched at millisecond speed. Enhanced diffraction efficiency is obtained by doping the liquid crystal with gold nanowires.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics