The 3D-orientation spectroscopy based on concurrent polarization analysis of vibrational spectra is applied to imaging of complex, anisotropic materials. This new imaging method will be able to bridge the gap in the relation of [process···(molecular structure)···property] by providing real-time, direct, molecular-level, microscopic images on molecular structure during manufacturing and failure. This innovative optical metrology will advance not only additive manufacturing and tissue engineering but also materials science and various US manufacturing sectors.
We have proposed analytical solutions to concurrent polarization IR and CARS spectroscopy data [2,3]. These approaches are used to analyze experimental results from semicrystalline polymers and other complex materials.
 Y. J. Lee, C. R. Snyder, A. M. Forster, M. T. Cicerone, W. Wu, Imaging the Molecular Structure of Polyethylene Blends with Broadband Coherent Raman Microscopy, ACS Macro Lett. 1, 1347 (2012).
 Y. J. Lee, Determination of 3D Molecular Orientation by Concurrent Polarization Analysis of Multiple Raman Modes in Broadband CARS Spectroscopy, Opt. Express 23, 29279 (2015).
 Y. J. Lee, Concurrent Polarization IR Analysis to Determine the 3D Angles and the Order Parameter for Molecular Orientation Imaging, Opt. Express 26, 24577 (2018).