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arXiv · 1112.4172

Surface plasmon resonance under conditions of electromagnetically induced transparency

Chunguang Du
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Abstract

A scheme for a surface plasmon resonance system under conditions of electromagnetically induced transparency (EIT) is proposed. The system is composed of three layers: a prism, a thin metal film, and a hybrid dielectric consisting of EIT atoms and a background substance. A probe and a coupling laser beam are input. Corresponding analytical formulas are derived for the cases when one or both of the laser beams excite surface plasmon polaritons at the metal/dielectric interface. Under resonance conditions, an extremely sharp dip appears in the reflectivity-frequency spectrum of the probe field, revealing new properties of two-dimensional EIT. The reflectivity is extremely sensitive to shifts in the laser frequencies and atomic levels, and to variations of permittivity of the substrate. This EIT-SPR system may to be used for novel magnetometers and biosensors.

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Chunguang Du. 2011-12-18. Surface plasmon resonance under conditions of electromagnetically induced transparency. https://doi.org/10.1007/s00339-012-7347-y

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