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We present fully-reconfigurable photonic integrated circuits (PICs) based on liquid-crystal-cladded slab waveguides. Our design utilizes a single-mode slab waveguide with a thin nematic liquid crystal (LC) cladding layer. We achieve local effective index modulation by controlling the LC’s director’s direction through electrodes integrated beneath the slab. As a proof of concept, we demonstrate a straight waveguide at 1550nm with voltage-controlled activation. The reconfiguration time and the excess loss due to LC were measured as 0.1 ms and 7.3 dB/cm, respectively. The low-temperature fabrication process enables cost-effective PICs on CMOS chips for 3D sensing, telecommunications, and data processing applications.
Conference Presentation
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Ayyoub Dehmollaian, Andrew McClung, Babak Mirzapourbeinekalaye, Amir Arbabi, "Reconfigurable photonic integrated circuits based on liquid-crystal-cladded slab waveguides," Proc. SPIE PC12890, Smart Photonic and Optoelectronic Integrated Circuits 2024, PC128900X (9 March 2024); https://doi.org/10.1117/12.3002084