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arXiv · 2505.04405

All-optical temporal integration mediated by subwavelength heat antennas

Yi Zhang·Nikolaos Farmakidis·Ioannis Roumpos·Miltiadis Moralis-Pegios·Apostolos Tsakyridis·June Sang Lee·Bowei Dong·Yuhan He·Samarth Aggarwal·Nikolaos Pleros·Harish Bhaskaran
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Abstract

Optical computing systems deliver unrivalled processing speeds for scalar operations. Yet, integrated implementations have been constrained to low-dimensional tensor operations that fall short of the vector dimensions required for modern artificial intelligence. We demonstrate an all-optical neuromorphic computing system based on time division multiplexing, capable of processing input vectors exceeding 250,000 elements within a unified framework. The platform harnesses optically driven thermo-optic modulation in standing wave optical fields, with titanium nano-antennas functioning as wavelength-selective absorbers. Counterintuitively, the thermal time dynamics of the system enable simultaneous time integration of ultra-fast (50GHz) signals and the application of programmable, non-linear activation functions, entirely within the optical domain. This unified framework constitutes a leap towards large-scale photonic computing that satisfies the dimensional requirements of AI workloads.

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BibTeXRIS

Yi Zhang, Nikolaos Farmakidis, Ioannis Roumpos, Miltiadis Moralis-Pegios, Apostolos Tsakyridis, June Sang Lee, Bowei Dong, Yuhan He, Samarth Aggarwal, Nikolaos Pleros, Harish Bhaskaran. 2025-05-07. All-optical temporal integration mediated by subwavelength heat antennas. https://arxiv.org/abs/2505.04405

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