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Spatial, spectral, and polarization multiplexed ptychography.

Robert Karl, Charles Bevis, Raymond Lopez-Rios

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    |December 25, 2015
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    Summary
    This summary is machine-generated.

    We developed a new ptychography imaging method for simultaneous full-field imaging of multiple sample sites. This technique allows for spatially resolved polarization spectroscopy and a larger field of view without sacrificing resolution.

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    Area of Science:

    • Coherent diffraction imaging
    • Optical microscopy
    • Spectroscopy

    Background:

    • Ptychography is a powerful lensless imaging technique.
    • Simultaneous imaging of multiple sample locations is challenging.
    • Spatially resolved polarization information is valuable for material characterization.

    Purpose of the Study:

    • To introduce a novel ptychography-based technique for simultaneous full-field imaging of multiple, spatially separated sample locations.
    • To enable spatially resolved polarization spectroscopy within a single scan.
    • To enhance the field of view in ptychography without compromising spatial resolution.

    Main Methods:

    • Developed a multi-mode ptychography approach using multiple probes (distinguished by wavelength or polarization).
    • Ensured mutual incoherence of diffracted light from separated sample sites at the detector.
    • Compared the numerical efficiency of the multi-mode algorithm against a single-mode algorithm.

    Main Results:

    • Achieved simultaneous full-field imaging of multiple, spatially distinct sample regions.
    • Enabled spatially resolved polarization spectroscopy from a single ptychography dataset.
    • Demonstrated the ability to image a larger field of view without loss of spatial resolution.

    Conclusions:

    • The novel multi-mode ptychography technique offers significant advantages for advanced imaging applications.
    • This method provides a more efficient way to acquire both structural and polarization information from multiple sample sites.
    • The approach is numerically comparable to single-mode ptychography, making it practical for widespread use.