title: Design and fabrication of rod-type two-dimensional photonic crystal slabs with large high-order bandgaps in near-infrared wavelengths.
abstract: We proposed a novel two-dimensional photonic crystal slab comprised of a number of silicon rods with different radii and locations in the square-lattice unit cell pattern. Such rod-type photonic crystal slabs were automatically optimized by the genetic algorithm and fabricated on the silicon-on-insulator wafer. In particular, the measured transmission spectra of the five-rods sample have shown a large accepted high-order bandgap between 1498 and 1648 nm (gap size is 9.54%). Based on the theories of multiple Bragg and Mie scattering effects, we have given a reasonable explanation to the large high-order bandgaps found in the present study.
authors.affiliation: Nanophotonic Laboratory, Department of Physics, Nanjing University of Science and Technology, Nanjing 210094, China. jly@mail.njust.edu.cn
authors.forename: Liyong
authors.initials: L
authors.lastname: Jiang
authors.forename: Wei
authors.initials: W
authors.lastname: Jia
authors.forename: Gaige
authors.initials: G
authors.lastname: Zheng
authors.forename: Xiangyin
authors.initials: X
authors.lastname: Li