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Analyzer‐free linear dichroic ptychography
Author(s) -
Chang Huibin,
Marcus Matthew A.,
Marchesini Stefano
Publication year - 2020
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s160057672001002x
Subject(s) - dichroic glass , ptychography , optics , dichroism , linear dichroism , spectrum analyzer , mueller calculus , materials science , transmission (telecommunications) , polarization (electrochemistry) , scattering , polarimetry , physics , circular dichroism , crystallography , diffraction , chemistry , computer science , telecommunications
Linear dichroism is an important tool to characterize the transmission matrix and determine the crystal or orbital orientation in a material. In order to achieve high‐resolution mapping of transmission properties, the linear‐dichroism scattering model in ptychographic imaging is introduced, and an efficient two‐stage reconstruction algorithm is developed. Using the proposed algorithm on a uniaxial material, the dichroic transmission matrix can be recovered without an analyzer by using ptychography measurements with as few as three different polarization angles, with the help of an empty region to remove phase ambiguities.