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All-optical temporal integration mediated by subwavelength heat antennas
Created by
Haebom
Author
Yi Zhang, Nikolaos Farmakidis, Ioannis Roumpos, Miltiadis Moralis-Pegios, Apostolos Tsakyridis, June Sang Lee, Bowei Dong, Yuhan He, Samarth Aggarwal, Nikolaos Pleros, Harish Bhaskaran
Outline
This paper presents an optical neuromorphic computing system based on time-division multiplexing (TDM). Capable of processing input vectors containing over 250,000 elements within a unified framework, the system utilizes thermo-optic modulation within a standing-wave optical field and employs titanium nanoantennas as wavelength-selective absorbers. Paradoxically, the system's thermal temporal dynamics allow for simultaneous temporal integration of ultra-fast (50 GHz) signals and application of programmable nonlinear activation functions entirely within the optical domain. This unified framework represents a leap forward toward large-scale optical computing that meets the dimensional requirements of AI workloads.
Takeaways, Limitations
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Takeaways:
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Implementation of an optical neuromorphic computing system capable of processing large-scale input vectors with more than 250,000 elements.
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We present an integrated framework that simultaneously performs time integration of ultrafast signals and application of nonlinear activation functions within the optical domain.
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Demonstrating the potential of large-scale optical computing to meet the dimensional requirements of AI workloads.
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Limitations:
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Lack of information on specific energy efficiency and overall performance indicators of the system.
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Lack of experimental validation for the system's scalability and real-world AI applications.
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Lack of evaluation of long-term stability and durability of titanium nanoantenna-based thermo-optic modulation.