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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

Takeaways:
Implementation of an optical neuromorphic computing system capable of processing large-scale input vectors with more than 250,000 elements.
We present an integrated framework that simultaneously performs time integration of ultrafast signals and application of nonlinear activation functions within the optical domain.
Demonstrating the potential of large-scale optical computing to meet the dimensional requirements of AI workloads.
Limitations:
Lack of information on specific energy efficiency and overall performance indicators of the system.
Lack of experimental validation for the system's scalability and real-world AI applications.
Lack of evaluation of long-term stability and durability of titanium nanoantenna-based thermo-optic modulation.
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