A microscopic view of the electromagnetic properties of sub-lambda metallic surfaces

作者：Lalanne, P.^*; Hugonin, J. P.; Liu, H. T.; Wang, B.

来源：SURFACE SCIENCE REPORTS, ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 453-469, 2009-10-31.

DOI：10.1016/j.surfrep.2009.07.003

• Sub-lambda metallic surfaces
• Surface plasmon polaritons
• Quasi-cylindrical waves
• Plasmonics
• Extraordinary optical transmission
• Diffraction
• Multiple scattering

We review the properties of the surface waves that are scattered by two-dimensional sub-lambda indentations on metallic surfaces. We show that two distinct waves are involved, a surface plasmon polariton (SPP) and a quasi-cylindrical wave (quasi-CW). We discuss the main characteristics of these waves, their damping characteristic lengths and their relative excitation weights as a function of the separation distance from the indentation and as a function of the metal conductivity. In particular, we derive a closed-form expression for the quasi-CW, which clarifies its physical origin and its main properties. We further present an intuitive microscopic model, which explains how the elementary SPPs and quasi-CWs exchange their energies by multiple scattering to build up a rich variety of near- and far field optical effects.

• 出版日期2009-10-31
• 单位南开大学