Guiding Light with Programmable Wall Defects

doi:10.1002/lpor.202400266

2024-07-17

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DOI：10.1002/lpor.202400266

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External-field controllable light-guiding structures are critical in the field of optical circuits and optical integration, and many well-designed solid-state waveguides have good performance but are weakly controllable. Although there have been attempts at liquid light guiding, liquid-filled waveguides cannot completely break the constraints of the solid structure, and in liquid crystal (LC), the smaller tuning angle of the optical soliton limits its further application. So designing a soft tunable light-guiding structure becomes an urgent but challenging task. In this work, a novel electrically switchable light-guiding structure with LC programmable wall defect is designed and verified. Wide-angle recyclable switching of light guiding under an electric field and optical erasure and rewriting of the structure are realized, unleashing the potential of soft-matter defect structures, and paving the way for soft optical devices and optoelectronic integration. A new external-field switchable liquid crystal defect structure is used to guide light. The structure satisfies a gradient distribution of refractive indices for light incident in a specific polarization direction, thus achieving a waveguide-like structure. An electric reversible switching and photorewritable programming of the defect structure can be realized, respectively. image

Keyword:

guiding light

liquid crystal

wall defect

期刊

Laser and Photonics Reviews

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3.7K

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2.1W

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