Near-Field Modification of Interference Components in Surface Plasmon Resonance

Details Near-Field Modification of Interference Components in Surface Plasmon Resonance Near-Field Modification of Interference Components in Surface Plasmon Resonance

2008-04-21

arxiv.org/abs/0804.3418v1

Physics

Optics

4 pages, 5 figures

Scientific paper

In an attenuated total reflection (ATR) geometry, energy extracted from an incident light beam by surface plasmon polariton (SPP) creation is implicitly considered to dissipate as heat. However, we show that a sharpened tip interacting with the SPP evanescent field can redirect some of the energy before such dissipation occurs. This behavior is examined with simple computer simulations and an analogy is drawn between it and a modified Mach-Zehnder interferometer. We also discuss "interaction-free" measurements with our set-up.

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