Refractive index sensor
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United States of America Patent
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Aug 17, 2010
Grant Date -
May 7, 2009
app pub date -
Aug 7, 2008
filing date -
Nov 7, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
An exemplary refractive-index sensor includes a photonic crystal microcavity structure, a light source, and a detector. The photonic crystal microcavity structure includes a photonic crystal layer having first holes and a second hole. The first holes are arranged in a pattern of staggered parallel rows. The second hole is located at an approximate center point of the middle row of the pattern rather than a first hole. A diameter of the second hole is less than that of each of the first holes. Some of the first holes disposed at each of opposite ends of a diagonal row having the second hole are omitted to define an input waveguide and an output waveguide. The light source is adjacent to the input waveguide. The detector is adjacent to the output waveguide.
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