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    Structured coherence states enable nanoscale 3D light features with low-coherence light in high-NA systems. These structures, like helical intensity and spin textures, enhance fields even in incoherent light.

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    Area of Science:

    • Optics and Photonics
    • Nanotechnology

    Background:

    • High-numerical aperture (high-NA) systems are vital for superresolution imaging and nanofabrication.
    • Wave interference in high-NA systems necessitates high light coherence for precise intensity and spin control.

    Purpose of the Study:

    • To investigate the generation of nanoscale 3D light features using structured coherence states with low-coherence light in high-NA resonator systems.
    • To explore the survival and characteristics of these features in incoherent optical fields.

    Main Methods:

    • Utilizing structured coherence states of light within a high-NA resonator system.
    • Analyzing the generated 3D light intensity and spin textures at the nanoscale.

    Main Results:

    • Successfully generated nanometer-scale 3D light features, including helical intensity and transverse spin textures, from low-coherence light.
    • Observed that these structured features persist in highly incoherent optical fields.
    • Found an counterintuitive enhancement of the longitudinal electric field component and transverse spin density despite decreased spatial coherence.

    Conclusions:

    • Structured coherence states offer a novel pathway to create intricate 3D light structures at the nanoscale, even with low-coherence light.
    • The generated twisted spectral density and spin structures have potential applications in advanced imaging and metrology.