title: Spatial filtering by axisymmetric photonic microstructures.
abstract: We propose and show experimentally axisymmetric spatial (angular) filtering of two-dimensional light beams by axisymmetric photonic microstructures. Such three-dimensional microstructures (similar to photonic crystals), in gapless configuration, were recorded in bulk of glass, where the refractive index has been point-by-point modulated using tightly focused femtosecond laser pulses. Axisymmetric angular filtering of approximately 25 mrad is demonstrated experimentally.
authors.forename: V
authors.initials: V
authors.lastname: Purlys
authors.forename: L
authors.initials: L
authors.lastname: Maigyte
authors.forename: D
authors.initials: D
authors.lastname: Gailevičius
authors.forename: M
authors.initials: M
authors.lastname: Peckus
authors.forename: M
authors.initials: M
authors.lastname: Malinauskas
authors.forename: R
authors.initials: R
authors.lastname: Gadonas
authors.forename: K
authors.initials: K
authors.lastname: Staliunas