Plasmonic Nanostructures in Optical Applications and Properties

Plasmonic nanostructures exploit the collective oscillation of conduction electrons at the interface between a metal and a dielectric to confine light at dimensions far below the diffraction limit. These resonant modes, typically referred to as localised surface plasmon resonances, give rise to intense near-field enhancements that can be tuned through composition, shape, size and dielectric environment. This tunability underpins a wide range of optical phenomena, from subwavelength imaging and spectroscopy to energy harvesting and chemical sensing. Recent advances in nanofabrication and colloidal synthesis have led to the creation of complex geometries, such as nanorings, nanocubes and heterointerfaces, which enable precise control over resonance frequency, field localisation and nonlinear response. Beyond classical electromagnetic behaviour, emerging studies reveal that plasmon excitation can induce transient structural and electronic modifications, opening avenues for active control of material properties. This dynamic interplay between light and matter has catalysed applications in ultrafast switching, surface-enhanced Raman scattering and hot-carrier-driven photocatalysis, with broad implications for telecommunications, biomedical diagnostics and sustainable energy technologies.

Research from Nature Portfolio

Recent studies have demonstrated that plasmon excitation can directly manipulate crystal structure and carrier dynamics. In covellite nanocrystals, intense localised surface plasmon resonance has been shown to trigger a cooperative Jahn–Teller effect, leading to metastable ionic displacements and photo-switchable conductivity at room temperature. This work extends plasmonics beyond field enhancement to active control of phase transitions. In heterostructured semiconductor–metal nanocrystals, near-infrared illumination has been used to generate hot holes via plasmon decay, achieving long-lived charge separation and high quantum yields. This plasmon-induced transit carrier transfer mechanism paves the way for efficient infrared-driven photochemical and energy-conversion systems.

Plasmonic Nanostructures in Optical Applications and Properties publication trend

The graph below shows the total number of articles in plasmonic nanostructures in optical applications and properties across all publications each year (not limited to Nature Index journals).

Technical terms

Plasmon: A collective oscillation of conduction electrons at the interface between a metal and a dielectric.

Localised surface plasmon resonance (LSPR): Resonant excitation of plasmons confined within metal nanostructures, leading to enhanced electromagnetic fields in their vicinity.

Hot carriers: High-energy electrons or holes generated when plasmons decay, which can drive chemical reactions or contribute to photocurrent.

Jahn–Teller effect: A distortion of a non-linear molecular or crystal system to lower its symmetry and energy when electronic degeneracy is present.

References

1. Localised surface plasmon resonance inducing cooperative Jahn–Teller effect for crystal phase-change in a nanocrystal. Nature Communications (2023).
2. Near infrared light induced plasmonic hot hole transfer at a nano-heterointerface. Nature Communications (2018).
3. Shape-altering flexible plasmonics of in-situ deformable nanorings. Nano Convergence (2023).
4. Plasmon-enhanced light–matter interactions and applications. npj Computational Materials (2019).