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Mobius metasurface for fully decoupled bidirectional light control
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DOI：10.1117/1.AP.8.2.026005.png)
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Abstract
En 中文
Simultaneous and independent manipulation of light's propagation direction, polarization state, and wavelength remains a fundamental challenge in photonics, due to the intrinsic entanglement of optical degrees of freedom imposed by reciprocity and structural symmetry. Here, we present a single-layer dielectric M & ouml;bius metasurface that achieves fully decoupled control across these three dimensions by leveraging a topology-inspired polarization-path inversion mechanism. Inspired by Mobius topology, our design maps forward and backward polarization trajectories onto a unified Poincare sphere via a synthetic phase-driven coordinate transformation, enabling direction-selective phase responses for arbitrary elliptical polarization states. To overcome the trade-offs between dispersion and polarization functionality, we introduce a neural network framework that co-optimizes Jones matrix responses across multiple polarizations, wavelengths, and directions. Experimentally, we demonstrate six completely independent holographic channels-defined by three polarization-wavelength combinations under opposite propagation directions-with high-fidelity image reconstructions and inter-channel crosstalk below 6.4%. In contrast to Janus-type or multilayer metasurfaces limited to interleaved or orthogonal polarization encoding, our approach offers a compact, lossless, and fabrication-compatible solution for multidimensional optical multiplexing.
Keywords:
Mobius metasurface
bidirectional light control
polarization-wavelength multiplexing
topological polarization mapping
multichannel holography
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18.8
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961
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3.6K
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