Full-color-sorting metalenses for high-sensitivity image sensors

  • Miyata M
  • Nemoto N
  • Shikama K
  • et al.
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Abstract

Image sensors play a critical role in current technologies ranging from smartphones to autonomous vehicles. In these technologies, high-sensitivity image sensors are highly desired because they enable dark-scene/ultra-fast imaging. Unfortunately, a conventional sensor architecture that employs color filters on every pixel fundamentally limits the detected light power per pixel because of the filtering, which has been a long-standing barrier to sensitivity improvement. Here, we demonstrate polarization-insensitive metasurface lenses (metalenses) that sort primary colors on high-density pixels without the use of color filters. The metalenses simultaneously act as pixel-scale color splitters and lenses and are compatible with complementary metal–oxide-semiconductor sensor technology. An image sensor with such metalenses significantly enhances the detected light power, while affording high image quality, incident angle tolerance, and sub-micrometer spatial resolution. The demonstrated architecture opens the way to the development of high-sensitivity color image sensors that exceed current limits while maintaining consistency with state-of-the-art sensor technology.

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APA

Miyata, M., Nemoto, N., Shikama, K., Kobayashi, F., & Hashimoto, T. (2021). Full-color-sorting metalenses for high-sensitivity image sensors. Optica, 8(12), 1596. https://doi.org/10.1364/optica.444255

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