Metasurface Polarization Manipulation in Optical Systems

Metasurface polarisation manipulation harnesses ultrathin, subwavelength arrays of engineered elements—meta-atoms—to exert precise control over the polarisation state, phase and amplitude of light within compact optical platforms. By exploiting spatially varying geometric and dynamic phases, these planar devices can replace bulky waveplates, polarisation rotators and vortex generators with wafer-scale components. Key strategies include the use of Pancharatnam–Berry phase for spin-dependent deflection, dynamic phase gradients for broadband operation, and spin–orbit coupling to interconvert spin angular momentum and orbital angular momentum. Such capabilities have enabled on-chip generation of vector vortex beams, full-Poincaré-sphere polarisers, multiplexed information channels and terahertz polarisation rotators. The global significance of this field spans high-capacity optical communications, quantum information processing, advanced microscopy and biomedical sensing, where miniaturisation, integration and multifunctionality are vital. Recent advances highlight the convergence of design algorithms, material innovation and active tuning to achieve efficient, broadband and reconfigurable polarisation control in next-generation photonic systems.

Research from Nature Portfolio

Recent studies have demonstrated cascaded phase-only metasurfaces trained via optical neural networks to generate high-purity Laguerre–Gaussian vortex modes with record-high radial and azimuthal orders. By splitting intensity redistribution and phase matching across two metasurfaces, purity exceeding 96 % in radial order and conversion efficiencies above 70 % were achieved, alongside strong suppression of back-reflections. Another approach employs a single spin-multiplexed dielectric metasurface for broadband generation of perfect Poincaré beams. This device maps all states on a hybrid-order Poincaré sphere with radius independent of topological charge, and encodes multidimensional spin and orbital angular momentum channels for optical encryption, demonstrating robust visible-light operation and paving the way for compact, high-dimensional information systems.

Metasurface Polarization Manipulation in Optical Systems publication trend

The graph below shows the total number of articles in metasurface polarization manipulation in optical systems across all publications each year (not limited to Nature Index journals).

Technical terms

Metasurface: A planar array of nanoscale structures that locally modulates the phase, amplitude and polarisation of light at subwavelength resolution.

Pancharatnam–Berry phase: A spin-dependent geometric phase acquired when the polarisation state of light is varied along a closed path.

Dynamic phase: A propagation-induced phase shift determined by optical path length and refractive index of the meta-atom material.

Poincaré sphere: A spherical representation of all possible polarisation states of light, with orthogonal polarisation basis at antipodal points.

Spin–orbit coupling: The interaction in which the spin angular momentum (polarisation) of light is converted into orbital angular momentum (phase vortex) or vice versa.

Orbital angular momentum (OAM): A twisted wave-front characteristic carrying integer-valued topological charge, representing an additional degree of freedom for encoding information.

References

1. Cascaded metasurfaces for high-purity vortex generation. Nature Communications (2023).
2. Broadband generation of perfect Poincaré beams via dielectric spin-multiplexed metasurface. Nature Communications (2021).
3. Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation. Opto-Electronic Advances (2024).
4. Metasurface for Engineering Superimposed Ince‐Gaussian Beams. Advanced Materials (2024).
5. Recent progress in metasurface-enabled optical waveplates. Nanophotonics (2022).