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RESEARCH PRODUCT
Metacoatings for wavelength-scale, high-numerical-aperture plano–concave focusing lenses
Carlos J. Zapata-rodríguezMahin NaserpourMahdieh HashemiCarlos Díaz-aviñósubject
PhysicsWavefrontbusiness.industryPhysics::OpticsStatistical and Nonlinear PhysicsExtraordinary optical transmission02 engineering and technology021001 nanoscience & nanotechnologyCurvature01 natural sciencesRefractionAtomic and Molecular Physics and Opticslaw.invention010309 opticsLens (optics)OpticsPlanarOptical tweezerslaw0103 physical sciencesOptoelectronics0210 nano-technologybusinessRefractive indexdescription
We design plano–concave silicon lenses with coupled gradient-index plasmonic metacoatings for ultrawide apertured focusing utilizing a reduced region of ∼20λ2. The anomalous refraction induced in the planar input side of the lens and in the boundary of the wavelength-scale focal region boosts the curvature of the emerging wavefront, thus significantly enhancing the resolution of the tightly focused optical wave. The formation of a light tongue with dimensions approaching those of the concave opening is here evidenced. This scheme is expected to have potential applications in optical trapping and detection.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-23 | Journal of the Optical Society of America B |