All-optical temporal integration mediated by subwavelength heat antennas

• URL: http://arxiv.org/abs/2505.04405v2
• Date: Tue, 05 Aug 2025 14:09:26 GMT
• Title: All-optical temporal integration mediated by subwavelength heat antennas
• Authors: Yi Zhang, Nikolaos Farmakidis, Ioannis Roumpos, Miltiadis Moralis-Pegios, Apostolos Tsakyridis, June Sang Lee, Bowei Dong, Yuhan He, Samarth Aggarwal, Nikolaos Pleros, Harish Bhaskaran,
• Abstract summary: Optical neuromorphic computing system capable of processing input vectors exceeding 250,000 elements within a unified framework.<n>System harnesses optically driven thermo-optic modulation in standing wave optical fields, with titanium nano-antennas functioning as wavelength-selective absorbers.
• Score: 3.2288610972024854
• License: http://creativecommons.org/licenses/by/4.0/
• 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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