title: Design and fabrication of nano-structured gradient index microlenses.
abstract: We present a novel fabrication technology for nano-structured graded index micro-optical components, based on the stack-and-draw method used for photonic crystal fibres. These discrete structures can be described with an effective refractive index distribution. Furthermore we present spherical nano-structured microlenses with a flat facet fabricated with this method and designed using an algorithm based on the Maxwell-Garnett mixing formula. Finally we show theoretical verification by using FDTD simulations for a nano-structured lens as well as experimental data obtained in the microwave regime.
authors.affiliation: Heriot Watt University, School of Engineering and Physical Sciences, Edinburgh, UK, EH14 4AS. fh22@hw.ac.uk
authors.forename: F
authors.initials: F
authors.lastname: Hudelist
authors.forename: R
authors.initials: R
authors.lastname: Buczynski
authors.forename: A J
authors.initials: AJ
authors.lastname: Waddie
authors.forename: M R
authors.initials: MR
authors.lastname: Taghizadeh