Localized surface plasmon

[1] The enhancement falls off quickly with distance from the surface and, for noble metal nanoparticles, the resonance occurs at visible wavelengths.

[2] For instance, the peak absorption wavelength of triangular silver nanoparticles was altered by changing the corner sharpness of the triangles.

[4] Additionally, peak absorption wavelength underwent a red-shift as a larger amount of HAuCl4 was added and porosity of the particles increased.

Some techniques frequently used to characterize surface plasmons are dark-field microscopy, UV-vis-NIR spectroscopy, and surface-enhanced Raman scattering (SERS).

[2] With dark-field microscopy, it is possible to monitor the spectrum of an individual metal nanostructure as the incident light polarization, wavelength, or variations in the dielectric environment is changed.

[8] Also, nanoparticles exhibiting strong LSP properties, such as gold nanorods, could enhance the signal in surface plasmon resonance sensing.

Other applications that rely on efficient light to heat generation in the nanoscale are heat-assisted magnetic recording (HAMR), photothermal cancer therapy, and thermophotovoltaics.