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Spatially multiplexed dielectric tensor tomography.

Juheon Lee, Seungwoo Shin, Herve Hugonnet

    Optics Letters
    |May 23, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed a cost-effective dielectric tensor tomography (DTT) method using spatial multiplexing. This technique reconstructs 3D optical anisotropy in materials like liquid crystals with high accuracy.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Biophysics

    Background:

    • Dielectric tensor tomography (DTT) is crucial for quantifying 3D optical anisotropy.
    • Existing DTT methods can be complex and costly.
    • Accurate measurement of optical anisotropy is vital in materials science and biophysics.

    Purpose of the Study:

    • To present a novel, cost-effective, and robust method for 3D dielectric tensor tomography.
    • To enable precise reconstruction of 3D dielectric tensors.
    • To demonstrate the method's applicability to liquid-crystal (LC) particles.

    Main Methods:

    • Utilized spatial multiplexing with two orthogonally polarized reference beams in an off-axis interferometer.
    • Multiplexed and demultiplexed two polarization-sensitive interferograms using a single camera and Fourier domain analysis.
    • Reconstructed 3D dielectric tensor tomograms by measuring polarization-sensitive fields across various illumination angles.

    Main Results:

    • Successfully demonstrated a cost-effective and robust DTT method.
    • Achieved accurate reconstruction of 3D dielectric tensors.
    • Validated the method by analyzing liquid-crystal particles with different orientational configurations (radial and bipolar).

    Conclusions:

    • The proposed spatial multiplexing DTT method offers an efficient approach for 3D optical anisotropy characterization.
    • This technique provides a valuable tool for studying anisotropic materials, including liquid crystals.
    • The method's cost-effectiveness and robustness make it suitable for broader scientific applications.