Terahertz Spectroscopic Polarimetry of Generalized Anisotropic Media Composed of Archimedean Spiral Arrays: Experiments and Simulations
Daniel J. Aschaffenburg,Michael R. C. Williams, Charles A. Schmuttenmaer
AIP The Journal of Chemical Physics
pp 1 - 31
Terahertz time-domain spectroscopic polarimetry has been used to measure the polarization state of all spectral components in a broadband THz pulse upon transmission through generalized
anisotropic media consisting of two-dimensional arrays of lithographically defined Archimedean spirals. The technique allows a full determination of the frequency-dependent complex-valued
transmission matrix and eigenpolarizations of the spiral arrays. Measurements were made on a series of spiral array orientations. The frequency-dependent transmission matrix elements as well as the eigenpolarizations were determined, and the eigenpolarizations were found be to elliptically corotating, as expected from their symmetry. Numerical simulations are in quantitative agreement with measured spectra.
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