Metasurface optics for full-color computational imaging

By Shane Colburn, A. Zhan, Arka Majumdar. Science Advances, 2018

337 citations recorded by the source corpus.

We design metalenses to capture colored images with white light by combining metasurfaces and computational imaging. Conventional imaging systems comprise large and expensive optical components that successively mitigate aberrations. Metasurface optics offers a route to miniaturize imaging systems by replacing bulky components with flat and compact implementations. The diffractive nature of these devices, however, induces severe chromatic aberrations, and current multiwavelength and narrowband achromatic metasurfaces cannot support full visible spectrum imaging (400 to 700 nm). We combine principles of both computational imaging and metasurface optics to build a system with a single metalens of numerical aperture ~0.45, which generates in-focus images under white light illumination. Our metalens exhibits a spectrally invariant point spread function that enables computational reconstruction of captured images with a single digital filter. This work connects computational imaging and metasurface optics and demonstrates the capabilities of combining these disciplines by simultaneously reducing aberrations and downsizing imaging systems using simpler optics.

Subfields: Acoustics and Ultrasonics, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/402e84bb3cc3f9fcc1c772a0bc1d42e2c1eabcbf

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In Biomedical Engineering

1. Stephen P. Boyd
2. Amir Arbabi

In Electronic, Optical and Magnetic Materials

1. Amir Arbabi
2. A. Faraon
3. Seyedeh Mahsa Kamali
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Citations in the corpus

• End-to-end optimization of optics and image processing for achromatic extended depth of field and super-resolution imaging (2018, background): “2017] and, in combination with a digital filter, achromatic EDOF [Colburn et al. 2018].”
• Scalable Nanoimprint Lithography Process for Manufacturing Visible Metasurfaces Composed of High Aspect Ratio TiO2 Meta-Atoms (2021, positive): “41,42 Using our nanoparticle-based NIL inks, metalenses traditionally requiring many steps are fabricated in a single step of direct-imprint NIL in under 2 min total process time and repeated >15 times with a single stamp.”
• Imaging based on metalenses (2020, methodology): “Right panel: imaging under white light [83] Zou et al.”