Importance

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Abstract

An optical element, as well as a metasurface formed by such optical elements, for use in photonic devices, are presented. The optical element is configured and operable as a sub-wavelength resonator having predetermined optical properties defining an optical response to incident light, wherein the optical element is configured as a metal-free multi-material structure of predetermined geometry and dimensions in which each two interfacing materials have positive and negative thermo-optic coefficients, respectively, such that the optical element has a near-zero effective thermo-optic coefficient, thereby providing substantial temperature invariance of said optical properties in predetermined wavelength and temperature ranges.

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First Claim