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Updated: Apr 25, 2026
08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
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Momentum-resolved Floquet spectroscopy on curved-time metasurfaces
Applied Optics
|April 24, 2026
Summary
This study introduces a novel metasurface platform that engineers Floquet quasi-energy surfaces using structured temporal curvature. This breakthrough enables precise control over optical dispersion and photonic band structures for advanced applications.
Area of Science:
- * Photonics and Metamaterials
- * Quantum Optics
- * Condensed Matter Physics
Background:
- * Periodic temporal modulation and geometric curvature are key but independent methods for manipulating optical dispersion.
- * Previous research has not engineered Floquet quasi-energy surfaces using spatially structured temporal curvature fields.
Purpose of the Study:
- * To demonstrate a novel metasurface/SAW platform capable of reshaping Floquet bands and Berry curvature.
- * To enable momentum-resolved control of quasi-energy gaps by unifying Floquet light dressing, non-Hermitian mode coupling, and temporal potentials.
- * To introduce a new platform for geometry-driven Floquet photonics.
Main Methods:
- * Development of a polarization-encoded holographic metasurface integrated with surface acoustic waves (SAW).
- * Utilizing spatially structured polarization fields to imprint momentum-dependent holographic phases.
- * Employing SAW-induced Gaussian acceleration fields to generate tunable temporal potentials (lapse function).
- * Characterization using momentum-resolved temporal interferometry and Fourier-plane spectroscopy.
Main Results:
- * Demonstrated unification of Floquet light dressing, non-Hermitian coupling, and temporal potentials on a single platform.
- * Sculpted Floquet interaction landscape, enabling valley-selective hybridization and anisotropic quasi-energy gaps.
- * Generated Berry curvature from engineered temporal geometry, opening geometric Floquet gaps.
- * Direct visualization of curvature-modified Floquet splittings and prediction of 0.1-1 THz gaps on graphene and ZnO metasurfaces.
Conclusions:
- * Holographically encoded curved-time metasurfaces offer a reconfigurable platform for manipulating photonic quasi-energy bands.
- * The platform enables momentum-selective optical logic, topological steering, and geometry-driven Floquet photonics.
- * This work pioneers the use of engineered temporal geometry to control Floquet band structures.
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