Tunable face-centered-cubic photonic crystal formed in holographic polymer dispersed liquid crystals.
We report on the fabrication and electro-optic measurements of face-centered-cubic (fcc) lattices in holographic polymer dispersed liquid-crystal materials. Four linearly polarized coherent plane waves were interfered to generate a fcc optical lattice that was subsequently and indefinitely recorded as an arrayed pattern of nanometer-sized liquid-crystal droplets (approximately 50 nm) at lattice nodes within a polymer matrix. Observed transmission spectra and Kossel diffraction curves are consistent with fcc crystal structure. A completely reversible 2% wavelength shift of the (+/- 111) stop band was observed on application of an electric field.
Escuti
M J
MJ
Division of Engineering and Department of Physics, Brown University, Providence, Rhode Island 02912, USA.
Qi
J
J
Crawford
G P
GP