title: Tunable face-centered-cubic photonic crystal formed in holographic polymer dispersed liquid crystals.
abstract: 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.
authors.affiliation: Division of Engineering and Department of Physics, Brown University, Providence, Rhode Island 02912, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Escuti
authors.forename: J
authors.initials: J
authors.lastname: Qi
authors.forename: G P
authors.initials: GP
authors.lastname: Crawford