Quantitative imaging of anisotropic material properties with vectorial ptychography

Abstract

Following the recent establishment of the formalism of vectorial ptychography [Opt. Lett.40, 5144 (2015)OPLEDP0146-959210.1364/OL.40.005144], first measurements, to the best of our knowledge, are reported in the optical range, demonstrating the capability of the proposed method to map the four parameters of the Jones matrix of an anisotropic specimen, and therefore to quantify a wide range of optical material properties, including power transmittance, optical path difference, diattenuation, retardance, and fast-axis orientation.

Joint estimation of object and probes in vectorial ptychography

“…In this section, we detail a practical implementation of our method in the optical range. The measured object was a birefringent target (R2L2S1B, Thorlabs), already described and investigated in [9].…”

“…Recorded data were processed using a reconstruction algorithm named vectorial PIE (vPIE). The vPIE was shown to be able to reconstruct the full anisotropic properties of the object, including transmittance, phase shift, retardance, and fast axis orientation, provided that the properties (amplitude, wavefront and state of polarization) of each of the three different probes were known [9].…”

Fourier ptychography: current applications and future promises

“…Polarization is a useful imaging modality for applications ranging from biomedicine to geology. To the best of our knowledge, there has not been any demonstration of polarization imaging with FP yet, although there are examples within the field of ptychography [204]. 9.…”

Reference-free polarization-sensitive quantitative phase imaging using single-point optical phase conjugation

“…, respectively. Then, the polarization-dependent measured fields using the APDs can be expressed as   To experimentally demonstrate the proposed method, spatially resolved Jones matrices of various samples are reconstructed [8,10,11,27,28]; a non-birefringent sample [a 10mdiameter polystyrene (PS) microsphere immersed in oil (n  1.56), Fig. 3(a)] and a birefringent sample [a maize starch granule (Corn Starch, Argo) immersed in oil (n  1.48), Fig.…”

“…The Jones matrix of a maize starch granule can provide scattered fields from the granule for any incident polarization state, which allows us to investigate anisotropic optical properties of the starch including retardance, elliptical polarization states of eigenstates, and linear and circular dichroism [10,28,37] the polarization eigenstates correspond to the fast or slow axes [10,28,37]. From the spatially resolved eigenvalues, we can obtain the retardance, a measure of the difference of optical paths with respect to the polarization eigenstates, as R  (2 1)    2 [ Fig.…”