Reconfigurable mid-infrared metasurfaces with loss-controlled achromatic spin–orbit state detection

Short summary

A reconfigurable Ge2Sb2Se4Te1 metasurface, switchable between amorphous and crystalline states, achieves achromatic spin-orbit state detection in the mid-infrared (3-3.3 μm) by using tunable loss contrast to control spin-to-orbital angular momentum (OAM) mapping, with detection fidelity below 9% relative error.

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