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.
Original language | English |
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Pages (from-to) | 2846-2848 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 35 |
Issue number | 17 |
DOIs | |
Publication status | Published - 1 Sept 2010 |