title: Blazing evanescent grating orders: a spectral approach to beating the Rayleigh limit.
abstract: We develop a way to enhance the amplitudes of the nonpropagating evanescent orders of resonant dielectric gratings. We use this blazing to design gratings with spectra tailored to generate steerable sub-Rayleigh field concentrations on a surface. We investigate the enhancement and customization of evanescent fields necessary to create a virtual and passive scanning probe with no moving parts. Spot size can be decreased 1 order of magnitude below the free-space Rayleigh limit.
authors.affiliation: Institute for Photonics and Optical Science (IPOS) and Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia.
authors.forename: C J
authors.initials: CJ
authors.lastname: Handmer
authors.forename: C
authors.initials: C
authors.lastname: Martijn de Sterke
authors.forename: R C
authors.initials: RC
authors.lastname: McPhedran
authors.forename: L C
authors.initials: LC
authors.lastname: Botten
authors.forename: M J
authors.initials: MJ
authors.lastname: Steel
authors.forename: A
authors.initials: A
authors.lastname: Rahmani