Light can travel in two dimensions {plasmon}| and so travel in plane. Photons that hit interface between conductor and insulator induce surface electrons to vibrate at same or similar frequency and cause traveling wave. Wave reflections make resonances. Plasmons {plasmonics} can have same or shorter wavelength as impinging light.
Physical Sciences>Physics>Wave>Electromagnetic>Photon
5-Physics-Wave-Electromagnetic-Photon
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Date Modified: 2022.0224