A single metasurface layer with an aperture on the opposite face of a flat substrate achieves diffraction-limited focusing over a >170-degree field of view, verified experimentally at 5.2 um up to 85 degrees.
Near-IR wide field-of-view Huygens metalens for outdoor imaging applications
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abstract
The ongoing effort to implement compact and cheap optical systems is the main driving force for the recent flourishing research in the field of optical metalenses. Metalenses are a type of metasurface, used for focusing and imaging applications, and are implemented based on the nanopatterning of an optical surface. The challenge faced by metalens research is to reach high levels of performance, using simple fabrication methods suitable for mass-production. In this paper we present a Huygens nanoantenna based metalens, designed for outdoor photographic/surveillance applications in the near-infra-red. We show that good imaging quality can be obtained over a field-of-view (FOV) as large as +/-15 degrees. This first successful implementation of metalenses for outdoor imaging applications is expected to provide insight and inspiration for future metalens imaging applications.
fields
physics.optics 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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A single-layer panoramic metalens with > 170{\deg} diffraction-limited field of view
A single metasurface layer with an aperture on the opposite face of a flat substrate achieves diffraction-limited focusing over a >170-degree field of view, verified experimentally at 5.2 um up to 85 degrees.