A coupled cascaded multilayer metasurface spaceplate achieves a 1.09 mm squeezed length with NA 0.13 and compression ratio of 14 by optimizing layer thicknesses to mimic free-space transmission.
The optimized SUS consists of 13 alternating polycrystalline silicon (poly -Si) and silicon dioxide (SiO2) subwavelength layers with a total thickness of 9.7406 μm
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2026 1verdicts
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Metasurface spaceplates reach a millimeter-scale squeezed length of free space
A coupled cascaded multilayer metasurface spaceplate achieves a 1.09 mm squeezed length with NA 0.13 and compression ratio of 14 by optimizing layer thicknesses to mimic free-space transmission.