Metamaterials and Electromagnetic Wave Manipulation

Metamaterials are artificial composites engineered to control electromagnetic waves in ways unattainable with natural materials. By arranging subwavelength elements into periodic or aperiodic architectures, these structures exhibit tailored permittivity and permeability, enabling phenomena such as negative refraction, superlensing and cloaking. Metasurfaces – two-dimensional analogues of bulk metamaterials – afford ultrathin platforms for phase, amplitude and polarisation control via locally engineered scatterers. Advances in design methods, from effective medium theory to full-wave inverse scattering, have driven rapid progress in beam shaping, holography, and dynamic tuning across microwave, terahertz and optical regimes. Recent work has explored active materials, bound states in the continuum and non-local interactions to enhance bandwidth, efficiency and angular stability. The result is a versatile toolkit for applications spanning wireless communications, sensing, imaging, energy harvesting and quantum information processing.

Research from Nature Portfolio

Recent studies have introduced a unified model of how electromagnetic waves escape arbitrarily shaped volumes by tunnelling. This approach establishes a precise diffraction limit and quantifies the maximum number of communicable channels across scales from nanoscale photonics to large-aperture optics. It reconciles multipole expansions and evanescent contributions under a single physical picture, offering design guidelines for maximising information throughput in antennas and imaging systems. Complementing this theoretical advance, another study has developed an efficient interaction-constant method to analyse inhomogeneous metasurfaces on dielectric substrates. By deriving closed-form expressions for effective polarizability tensors, the method accelerates the design of supercells for wideband terahertz absorption and beam control, validating results against full-wave simulations and enabling practical metasurface designs with minimal computational overhead.

Metamaterials and Electromagnetic Wave Manipulation publication trend

The graph below shows the total number of articles in metamaterials and electromagnetic wave manipulation across all publications each year (not limited to Nature Index journals).

Technical terms

Metamaterials: Artificial composites with engineered permittivity and permeability enabling unconventional wave phenomena.

Metasurfaces: Two-dimensional arrays of subwavelength scatterers that control phase, amplitude and polarisation of incident waves.

Effective medium theory: A homogenisation approach treating a structured medium as a continuum with averaged electromagnetic properties.

Polarizability: A tensor describing how an individual scatterer acquires dipole moments in response to local fields.

Mie resonance: Resonant scattering modes in dielectric particles arising from constructive interference of internal and external fields.

Fano resonance: Asymmetric line-shape arising from interference between a narrow discrete resonance and a broad spectral background.

Tunnelling escape: The process by which evanescent or bound waves convert into propagating modes to exit a bounded region.

Bianisotropy: Magnetoelectric coupling in a material or scatterer whereby electric fields induce magnetic dipoles and vice versa.

References

1. Tunnelling escape of waves. Nature Photonics (2024).
2. Substrated inhomogeneous metasurfaces analysis using interaction constant method. Scientific Reports (2023).
3. Multiscale design of large and irregular metamaterials. Physical Review Applied (2024).
4. Dielectric Resonance-Based Optical Metasurfaces: From Fundamentals to Applications. iScience (2020).
5. Mesotronics: Some New, Unusual Optical Effects. Photonics (2022).