Dispersion-controlled diffractive devices with dielectric metasurfaces

Abstract

Diffractive optical devices follow a negative chromatic dispersion dictated by device function. Here we show that metasurfaces with independent control of phase and group delays enable diffractive devices that break this relation. We demonstrate gratings and focusing mirrors with enhanced negative, zero, and positive dispersion.

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© 2017 IEEE. Date Added to IEEE Xplore: 23 November 2017.

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