Scanned conical illumination as a probe of electro-optic retro-reflection.

Clicks: 239
ID: 93786
2019
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Abstract
We describe a prototype element for use in probing electro-optic retro-reflection in sensor applications, illuminating a planar-aligned nematic liquid crystal electro-optic cell with convergent light having a single, tunable angle of incidence (tunable conical illumination). This illumination is generated using a 100X, high numerical aperture, long working-distance microscope objective under conditions of extreme spherical aberration. The electro-optic effect observed is multiple-beam optical interference between polarized reflections from the two bounding plates of the cell, rendered tunable with voltage-controlled refractive index changes induced by molecular reorientation of the liquid crystal. Characterization of the reflectivity vs. angle of incidence and applied voltage enables identification of conditions of high-contrast, low power, electro-optic reflectivity control applicable to fiber optics.
Reference Key
alshomrany2019scannedoptics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Alshomrany, Ali S;Nguyen, Z;Maclennan, Joseph E;Clark, Noel A;
Journal Optics express
Year 2019
DOI
10.1364/OE.27.018383
URL
Keywords
aptamer aflatoxin b1 optical planar waveguide polarization interferometer refractive index sensitivity

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