Plasmonics in Grating Structures and Surface Wave Phenomena
Summary
Plasmonics explores the interaction between electromagnetic waves and collective electron oscillations at metal–dielectric interfaces, with grating structures serving as a vital means of momentum matching and field enhancement. One- and two-dimensional gratings enable excitation of surface plasmon polaritons (SPPs) beyond the light line, giving rise to phenomena such as extraordinary optical transmission (EOT), plasmonic band gaps and sharp resonance features. The periodic modulation of metallic surfaces creates new dispersion relations for SPPs, leading to band-edge localisation, directional beaming and tailored absorption spectra. Advances in nanofabrication and modelling have deepened understanding of Fabry–Pérot cavity modes within grating slits, the interplay between cavity and surface modes, and the influence of grating depth and geometry on propagation losses. These insights underpin applications spanning ultrasensitive biosensing, sub-wavelength imaging, on-chip photonic circuits and improved light‐trapping in photovoltaic cells. By engineering grating periodicity, profile and materials, researchers can control radiative and non-radiative damping, spectral linewidths and angular radiation patterns, thus harnessing surface wave phenomena for enhanced light–matter interaction and energy conversion technologies.
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Plasmonics in Grating Structures and Surface Wave Phenomena publication trend
The graph below shows the total number of articles in plasmonics in grating structures and surface wave phenomena across all publications each year (not limited to Nature Index journals).
Technical terms
Surface plasmon polariton (SPP): Electromagnetic wave coupled to collective electron oscillations at a metal–dielectric interface, confined to the surface.
Nanograting: A periodic arrangement of nanoscale grooves or slits in a metallic film, used to manipulate light–matter interactions.
Extraordinary optical transmission (EOT): Enhanced light transmission through sub-wavelength apertures in a metallic film, mediated by SPP excitation.
Fabry–Pérot cavity mode: Standing wave resonance formed within a slit or cavity bounded by reflective interfaces.
Plasmonic band gap: Frequency range in a periodic plasmonic structure where propagating surface modes are forbidden, leading to inhibited transmission.
Wood–Rayleigh anomaly: Sharp feature in diffraction spectra occurring when a diffracted order becomes grazing, often interacting with plasmonic resonances.
References
- Simulation-based design of 1-D copper nanograting device for sensing application by studying electromagnetic properties on Cu/Air interface. Journal of King Saud University - Science (2024).
- Comparison of plasmon surface waves on shallow and deep metallic 1D and 2D gratings.. Optics Express (2007).
- Plasmonic band edge effects on the transmission properties of metal gratings. AIP Advances (2011).
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