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Article Dans Une Revue Optics Express Année : 2022

Over-wavelength pitch sized diffraction gratings for augmented reality applications

Résumé

Waveguide based optical combiners for augmented reality (AR) glasses are integrating several surface relief gratings (SRG) whose pitch sizes can be as small as 200 nm for the blue wavelength. All SRG components exploit the first diffraction order to couple in and out or to deviate the light. We present SRG using higher diffraction orders featuring over-wavelength pitch sizes. Our gratings use the edge wave (EW) diffraction phenomenon to steer light in the preferred far field direction.
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Dates et versions

hal-03561356 , version 1 (25-08-2022)

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Valter Drazic, Oksana Shramkova, Bobin Varghese, Laurent Blondé, Vincent Brac de La Perrière, et al.. Over-wavelength pitch sized diffraction gratings for augmented reality applications. Optics Express, 2022, 30 (2), pp.1293-1303. ⟨10.1364/OE.446077⟩. ⟨hal-03561356⟩
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