Published January 1, 2012 | Version v1
Journal article Open

Plasmon interferometers for high-throughput sensing

  • 1. Bilkent Univ, Dept Phys, TR-06800 Ankara, Turkey

Description

In this letter, we demonstrate a refractive index sensor based on a subwavelength plasmon interferometer. Illumination of an atilt subwavelength slit-grove pair on a metal surface with monochromatic light generates high-contrast interference fringes of the transmitted light. Detection of the refractive index of the dielectric medium on the metal surface is based on examining the relative position of the interference fringes. Integration of the plasmon interferometer with a microfluidic channel provides a sensitive, high-throughput sensor with small detection volume. (C) 2012 Optical Society of America

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