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In article number 1901033, Andreas Heßler, Thomas Taubner, and co‐workers introduce the concept of advanced optical addressing of a metasurface covered with a phase‐change material. The size, position, and crystallization depth of the switched phase‐change material can be controlled using a red laser beam, leading to controlled resonance tuning for each individual meta‐atom. By modifying the optical...
Nanometer‐thick active metasurfaces (MSs) based on phase‐change materials (PCMs) enable compact photonic components, offering adjustable functionalities for the manipulation of light, such as polarization filtering, lensing, and beam steering. Commonly, they feature multiple operation states by switching the whole PCM fully between two states of drastically different optical properties. Intermediate...
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