title: Tunable complex photonic chiral lattices by reconfigurable optical phase engineering.
abstract: We present a novel single-step fabrication approach, based on optical phase engineering, for tunable complex photonic chiral lattices of diverse geometries in a large area. By means of engineered reconfigurable phase patterns, we computationally simulate as well as experimentally investigate these complex structures. We show the generation of both periodic right- and left-handed chiral structures as well as photonic transversely quasi-crystallographic chiral structures. These complex chiral lattices are also demonstrated in a photorefractive material, and the lattice formation is analyzed by plane-wave-guided imaging as well as diffraction pattern imaging. Furthermore, complex photonic chiral structures with engineered tunable relative phase shifts between adjacent spiral units realizable in a single step are explored and analyzed.
authors.affiliation: Department of Physics, Indian Institute of Technology Delhi, New Delhi, India. jolly.xavierp@gmail.com
authors.forename: Jolly
authors.initials: J
authors.lastname: Xavier
authors.forename: Joby
authors.initials: J
authors.lastname: Joseph