By SILSEF
There are two main types of plasmonic effects: localized and non-localized. Non-localized plasmonic effects, such as Surface Plasmon Resonance (SPR), are commonly used in sensing applications. In this case, the resonance is caused by the interaction between incident light and a metallic surface with a periodic nanopattern. This interaction results in a broad absorption dip in the reflection spectrum at the resonance wavelength or coupling angle. These responses can be utilized in sensors to detect various species, such as gases or molecules. On the other hand, localized plasmonic effects involve the enhancement of the electromagnetic field of incident light in a specific area. This localized enhancement can be used to improve optical coupling, as seen in Surface-Enhanced Raman Scattering (SERS) based sensors. Prism detection and angular analysis. Gold nano-patterns for SERS and LSPR detection devices.
