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Apophyllite waveplates

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Abstract

We investigate the polarization characteristics of apophyllite crystals in an attempt to evaluate their potential use for achromatic waveplates. Among the 50 plates that we extracted and polished from natural apophyllite crystals, a few show the sought-for characteristic of birefringence that increases linearly with the wavelength. However, we also find that the crystals among our samples exhibit a sectored structure in their polarization properties, as well as an undesirable degree of spatial nonuniformity.

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Supplementary Material (3)

NameDescription
Supplement 1       Polarization images of additional apophyllite waveplate samples.
Visualization 1       Cleaving a thin slab from a piece of raw apophyllite crystal.
Visualization 2       View of an apophyllite waveplate sample, transilluminated with circularly polarized white light, and analyzed with a slowly rotating linear polarizer.

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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