Achromatic Metalens in the Visible and Metalens with Reverse Chromatic Dispersion
arXiv:1701.06696 · doi:10.1021/acs.nanolett.6b05137
Abstract
In this letter, we experimentally report an achromatic metalens (AML) operating over a continuous bandwidth in the visible. This is accomplished via dispersion engineering of dielectric phase shifters: titanium dioxide nanopillars tiled on a dielectric spacer layer above a metallic mirror. The AML works in reflection mode with a focal length independent of wavelength from wavelength of 490 nm to 550 nm. We also design a metalens with reverse chromatic dispersion, where the focal length increases as the wavelength increases, contrary to conventional diffractive lenses. The ability to engineer the chromatic dispersion of metalenses at will enables a wide variety of applications that were not previously possible. In particular, for the AML design, we envision applications such as imaging under LED illumination, fluorescence, and photoluminescence spectroscopy.
References in corpus (9)
- Dielectric Metasurfaces for Complete Control of Phase and Polarization with Subwavelength Spatial Resolution and High Transmission
- Subwavelength-thick Lenses with High Numerical Apertures and Large Efficiency Based on High Contrast Transmitarrays
- Multiwavelength Achromatic Metasurfaces by Dispersive Phase Compensation
- High-Efficiency All-Dielectric Metasurfaces for Ultra-Compact Beam Manipulation in Transmission Mode
- High efficiency dielectric metasurfaces at visible wavelengths
- Flat Dielectric Grating Reflectors with High Focusing Power
- Multiwavelength polarization insensitive lenses based on dielectric metasurfaces with meta-molecules
- Low Contrast Dielectric Metasurface Optics
- Integrated Plasmonic Metasurfaces for Spectropolarimetry
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- A broadband achromatic polarization-insensitive metalens consisting of anisotropic nanostructures
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- Metasurface Optics for Full-color Computational Imaging
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- An Ultra-high Numerical Aperture Metalens at Visible Wavelengths
- Neural Nano-Optics for High-quality Thin Lens Imaging
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- Multifunctional Nonlocal Metasurfaces
- Generalized Hartmann-Shack array of dielectric metalens sub-arrays for polarimetric beam profiling
- A Hybrid Achromatic Metalens
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- Topology Optimized Multi-layered Meta-optics
- Topology optimization of freeform large-area metasurfaces
- Silicon nitride metalenses for unpolarized high-NA visible imaging
- Computational inverse design for cascaded systems of metasurface optics
- Overlapping domains for topology optimization of large-area metasurfaces
- Achromatic varifocal metalens for the visible spectrum
- Hyper Resolute Ultra thin Low Cost All-Dielectric Broadband Achromatic Metalenses
- Hyper Resolution Two Photon Direct Laser Writing using ENZ Nano-Cavity
- Design and Analysis of Extended Depth of Focus Metalenses for Achromatic Computational Imaging
- Inverse Designed Extended Depth of Focus Meta-Optics for Broadband Imaging in the Visible
- Simultaneous achromatic and varifocal imaging with quartic metasurfaces in the visible
- Inverse design of optical elements based on arrays of dielectric spheres
- Inverse-designed flat lens for imaging in the visible & near-infrared with diameter > 3mm and NA=0.3
- End-to-end joint optimization of metasurface and image processing for compact snapshot hyperspectral imaging
- Tutorial: Exciton resonances for atomically-thin optics
- Multifunctional Metasurface Design with a Generative Adversarial Network
- Bandwidth Limit and Synthesis Approach for Single Resonance Ultrathin Metasurfaces
- Broadband behavior of quadratic metalenses with a wide field of view
- Dielectric Metasurfaces for Complete and Independent Control of Optical Amplitude and Phase
- A Novel Modeling Approach for All-Dielectric Metasurfaces Using Deep Neural Networks
- Reflection and refraction problems for metasurfaces related to Monge-Ampère equations
- How good is your metalens? Experimental verification of metalens performance criterion
- Deep Convolutional Neural Networks to Predict Mutual Coupling Effects in Metasurfaces
- Broadband Polarization-Independent Achromatic Metalenses with Unintuitively-Designed Random-Shaped Meta-Atoms
- Perfect Diffraction with Bianisotropic Metagratings
- Electro-Optically Tunable Universal Metasurfaces
- Efficient perturbative framework for coupling of radiative and guided modes in nearly periodic surfaces
- Phase and dispersion engineering of metalenses: broadband achromatic focusing and imaging in the visible
- Collaborative On-Sensor Array Cameras
- Single-shot three-dimensional imaging with a metasurface depth camera
- Towards efficient random metasurfaces
- Generating Spatial Spectrum with Metasurfaces
- Ultra-compact, high-NA achromatic multilevel diffractive lens via metaheuristic approach
- Imaging with flat optics: metalenses or diffractive lenses?