title: Optimized structures for photonic quasicrystals.
abstract: A photonic quasicrystal consists of two or more dielectric materials arranged in a quasiperiodic pattern with noncrystallographic symmetry that has a photonic band gap. We use a novel method to find the pattern with the widest TM-polarized gap for two-component materials. Patterns are obtained by computing a finite sum of density waves, assigning regions where the sum exceeds a threshold to a material with one dielectric constant, epsilon1, and all other regions to another, epsilon0. Compared to optimized crystals, optimized quasicrystals have larger gaps at low constrasts epsilon1/epsilon0 and have gaps that are much more isotropic for all contrasts. For high contrasts, optimized hexagonal crystals have the largest gaps.
authors.affiliation: Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: Mikael C
authors.initials: MC
authors.lastname: Rechtsman
authors.forename: Hyeong-Chai
authors.initials: HC
authors.lastname: Jeong
authors.forename: Paul M
authors.initials: PM
authors.lastname: Chaikin
authors.forename: Salvatore
authors.initials: S
authors.lastname: Torquato
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Steinhardt