plasmoniikka

Plasmonics is a field of study that focuses on the interaction between light and free electrons in metals. When light shines on a metal surface, it can excite these free electrons, causing them to collectively oscillate. These collective oscillations are known as surface plasmons. These plasmons can exhibit unique optical properties, such as the ability to confine light to dimensions much smaller than its wavelength, a phenomenon not possible with conventional optics.

This confinement of light to the nanoscale has significant implications for various technological applications. Plasmonic devices can be used to enhance light absorption and emission, leading to improvements in solar cells and LEDs. They also play a role in sensing technologies, where changes in the local environment can alter the plasmon resonance, allowing for the detection of minute quantities of substances. Furthermore, plasmonics is being explored for its potential in high-density data storage and in the development of novel optical circuits. The study of plasmonics bridges the disciplines of physics, chemistry, materials science, and engineering, seeking to harness the unique behaviors of light at the nanoscale.