Holographic photopolymers allow us to record complex 3D refractive index structures with scale down to ~100 nm in volumes as large as cubic cm.  Modelling and device optimizatoin requires us to precisely and accurately measure these 3D index structures which is generally not possible with off-the-shelf instrumentation.  We have thus developed a number of different custom microscopic and tomographic measurement systems specifically for quantifying properties at the micron scale within much larger 3D volumes.  By combinging these refractive index measurents with precise models of how local concentrations create that index, these instruments serve to quantify the composition of the sample, often at spatial and temporal scales unavailable by (e.g.) infrared spectroscopy.

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This work has been generously funded by

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