What is Surface Plasmon Resonance?

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PhysicsEnjoyer31415
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Can someone please explain to me SPR in detail and mathrmatics of it if any. I have a basic idea that it is something like photoelectric effect but instead of electron a photonof different wavelength is shot off because some of the energy is absorbed by the material. Am i correct ? Please help .Thank you.
Surface_Plasmon_Resonance_(SPR).jpg
 
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tech99 said:
There is quite a good video about this at the following URL:-

Thank you