If by "plasmonic effect" you are referring to the physics of plasmon excitations, then I refer you to the following works:

Pines and Nozières, The Theory of Quantum Liquids (W.A. Benjamin, New York, 1966).

Negele and Orland, Quantum Many Particle Systems (Westview Press, 1988), Sec. 5.4.

Mattuck, A Guid to Feynman Diagrams in the Many-Body Problem (McGraw-Hill, New York, 1967), pp. 12-15.

March and Parrinello, Collective Effects in Solids and Liquids (Hilger, Bristol, 1982).

At the expense of being found guilty of advertising my own work, I also refer you to the following publications and the references therein:

http://www.tandfonline.com/doi/abs/10.1080/01418639408240158

B. Farid, in Electron Correlation in the Solid State, edited by NH March (Imperial College Press, 1999); Chapter 3, Sec. 6.

I'd recommend you two books:

1) S. Maier, "Plasmonics: fundamentals and applications" (Springer, 2007)

2) L. Novotny, B. Hecht, “Principles of Nano-Optics” (Cambridge University Press, 2006)

Both are excellent - I used them for class notes.

Heinz Raether, "Surface Plasmons on Smooth and Rough Surfaces and on Gratings"

The book is old but is must for the field

to Nadia

Absolutely, the classics!