Freeform direct-write and rewritable photonic integrated circuits in phase-change thin films

Mo Li; Changming Wu; Haoqin Deng; Yi-Siou Huang; Heshan Yu; Ichiro Takeuchi; Carlos A. Ríos Ocampo

doi:10.1117/12.3012782

13 March 2024 Freeform direct-write and rewritable photonic integrated circuits in phase-change thin films

Mo Li, Changming Wu, Haoqin Deng, Yi-Siou Huang, Heshan Yu, Ichiro Takeuchi, Carlos A. Ríos Ocampo

Proceedings Volume PC12896, Photonic and Phononic Properties of Engineered Nanostructures XIV; PC128960B (2024) https://doi.org/10.1117/12.3012782
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We report direct-write and rewritable photonic circuits based on a low-loss phase change material (PCM) thin film Sb2Se3, in which complete end-to-end functional photonic circuits can be created by direct laser writing in one step without additional fabrication processes. The direct-write phase-change photonic circuit affords exceptional flexibility, allowing any part of the circuit to be erased and rewritten, facilitating rapid design modification and reprogramming. We demonstrate the versatility of this technique with various photonic circuits for diverse applications, including an optical interconnect fabric for reconfigurable networking, a photonic crossbar array as a tensor core for optical computing, and a tunable optical filter for optical signal processing. Our technique unlocks new paradigms for programmable photonic networking, computing, and signal processing. Moreover, the rewritable photonic circuits enable rapid prototyping and testing in a convenient and cost-efficient manner, eliminate the need for nanofabrication facilities, thus promote the proliferation of photonics research and education to a broader research community.

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Mo Li, Changming Wu, Haoqin Deng, Yi-Siou Huang, Heshan Yu, Ichiro Takeuchi, and Carlos A. Ríos Ocampo "Freeform direct-write and rewritable photonic integrated circuits in phase-change thin films", Proc. SPIE PC12896, Photonic and Phononic Properties of Engineered Nanostructures XIV, PC128960B (13 March 2024); https://doi.org/10.1117/12.3012782

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KEYWORDS

Photonic integrated circuits

Thin films

Optical computing

Multiphoton lithography

Optical interconnects

Optical signal processing

Prototyping

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