Multiwavelength achromatic metasurfaces by dispersive phase compensation

By F. Aieta, Mikhail A. Kats, Patrice Genevet, F. Capasso. Science, 2014

1,008 citations recorded by the source corpus.

Color correcting planar optics The functionality of many bulk optical elements can now be replaced by specially designed structures fabricated in thin films. This planar optics approach, however, has generally been applicable to only a narrow band of wavelengths. Aieta et al. show that chromatic dispersion, or color dependence, can be compensated for by the judicious design of the surface. The results demonstrate a general approach for the fabrication of broadband and lightweight optical elements that can be engineered into planar thin films. Science, this issue p. 1342 Arrays of dielectric resonators can be designed for multiwavelength response. The replacement of bulk refractive optical elements with diffractive planar components enables the miniaturization of optical systems. However, diffractive optics suffers from large chromatic aberrations due to the dispersion of the phase accumulated by light during propagation. We show that this limitation can be overcome with an engineered wavelength-dependent phase shift imparted by a metasurface, and we demonstrate a design that deflects three wavelengths by the same angle. A planar lens without chromatic aberrations at three wavelengths is also presented. Our designs are based on low-loss dielectric resonators, which introduce a dense spectrum of optical modes to enable dispersive phase compensation. The suppression of chromatic aberrations in metasurface-based planar photonics will find applications in lightweight collimators for displays, as well as chromatically corrected imaging systems.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/07b59021c4d887de56151a4653c3984b4c1080bd

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Citations in the corpus

High-efficiency and full-space manipulation of electromagnetic wave-fronts with metasurfaces (2017, background): “Recently, metamaterials (artificial materials made by subwavelength microstructures with tailored EM properties) and particularly their planar version, metasurfaces, have demonstrated strong capabilities to manipulate EM waves, generating many fascinating effects such as anomalous refraction/reflect”
Electromagnetic metasurfaces: physics and applications (2019, neutral): “The building block consists of two coupled rectangular dielectric resonators of fixed height t and varying widths w1 and w2 [258].”
Multiwavelength polarization insensitive lenses based on dielectric metasurfaces with meta-molecules (2016, positive): “Multiple resonances of meta-atoms formed from two rectangular dielectric resonators were used in an effort to provide this phase coverage at three wavelengths in [26,27].”
A review of gap-surface plasmon metasurfaces: fundamentals and applications (2018, background): “Recently, several efforts have been dedicated to eliminate chromatic aberration of metalens by either dispersive phase compensation using multiple meta-atoms [84, 85] or birefringent unit cells with equal focal length for orthogonally polarized light at two different wavelengths [86].”
Metalenses: Versatile multifunctional photonic components (2017, methodology): “Toward this goal, a dispersive phase-compensation approach bymeans of coupled dielectric resonators was implemented to correct the chromatic aberration at several discrete wavelengths (80).”
MEMS-tunable dielectric metasurface lens (2017, background): “To make multiwavelength tunable doublets, many of the recently demonstrated approaches for making multiwavelength metasurfaces can be directly applied 56,64 – 66 .”
Ultracompact metasurface in-line polarimeter (2016, background): “The latter notably includes the ability to reduce an entire system of bulk optical components to a single, ultrathin optical element, such as achromats [26] and high-NA aspheres [27].”