Extreme Asymmetry in Metasurfaces via Evanescent Fields Engineering: Angular-Asymmetric Absorption
arXiv:1801.09397 · doi:10.1103/PhysRevLett.121.256802
Abstract
On the quest towards full control over wave propagation, the development of compact devices that allow asymmetric response is a challenge. In this Letter, we introduce a new paradigm for the engineering of asymmetry in planar structures, revealing and exploiting unilateral excitation of evanescent waves. We test the idea with the design and experimental characterization of a metasurface for angular-asymmetric absorption. The results show that the contrast ratio of absorption (the asymmetry level) can be arbitrarily engineered from zero to infinity for waves coming from two oppositely tilted angles. We demonstrate that the revealed asymmetry effects cannot be realized using conventional diffraction gratings, reflectarrays, and phase-gradient metasurfaces. This Letter opens up promising possibilities for wave manipulation via evanescent waves engineering with applications in one-side detection and sensing, angle-encoded steganography, flat nonlinear devices and shaping the scattering patterns of various objects.
arXiv comment6 pages
References in corpus (11)
- Circular conversion dichroism in planar chiral metamaterials
- Asymmetric transmission of linearly polarized light at optical metamaterials
- Meta-Gratings: Beyond the Limits of Graded Metasurfaces for Wavefront Control
- Space-time gradient metasurfaces
- All-Passive Nonreciprocal Metasurface
- Functional metamirrors
- Unveiling the properties of metagratings via a detailed analytical model for synthesis and analysis
- Flat Engineered Multi-Channel Reflectors
- All-dielectric reciprocal bianisotropic nanoparticles
- Manipulation of Giant Faraday Rotation in Graphene Metasurfaces
- Interference Induced Asymmetric Transmission Through A Monolayer of Anisotropic Chiral Metamolecules
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