Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a new type of metalens that can focus light into multiple foci, providing enhanced control over the spectral, polarization, and ellipticity of light. This could have a wide range of applications in optical communications, imaging, and sensing. The new multi-foci metalens could be used to precisely manipulate light in ways that are not possible with conventional lenses, potentially leading to faster, more efficient optical systems. The research was published in Nature Photonics.

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source: Phys.org