Subwavelength Surfaces
Over the past decade, many structures relying on a complex multidimensional refractive index engineering have been fabricated and tested to cover a number of device applications. The objective of these researches is to control the propagation, the confinement, the emission and detection of light, i.e. to manipulate light at the wavelength scale. This Work Package is oriented towards the applied aspects which are relevant for the whole NEMO partnership.
It is devoted to the study of subwavelength structured surfaces which can be manufactured by planar fabrication tools at a single interface and which can meet the demand of the large scale industries in the next decade. Particular attention is paid to dielectric high-aspect-ratio diffractive optical elements, resonant diffractive gratings, metallic subwavelength optical surfaces and AR moth-eye-like surfaces.
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Left : Moth-eye-type anti-reflection processed plano-plano-substrates (CSEM). Right : Moth-eye-type anti-reflection processed plano-curved substrates (ISE). The processed surface is the curved one. |
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Near-field calculation in the Young’s double-slit experiment (NCRS-LCFIO), showing the surface plasmon interference at the gold-glass interface between the two slits. Plane wave illumination from air is assumed for the calculation. |
SEM picture of a bi-grating gold grating on a GaAs substrate (CNRS-LPN). The square hole size is 450 nm. |
Contact person
Lalanne Philippe
