1. Edge-guided inverse design of digital metamaterials for ultra-high-capacity on-chip multi-dimensional interconnect
- Author
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Sun, Aolong, Xing, Sizhe, Deng, Xuyu, Shen, Ruoyu, Yan, An, Hu, Fangchen, Yuan, Yuqin, Dong, Boyu, Zhao, Junhao, Huang, Ouhan, Li, Ziwei, Shi, Jianyang, Zhou, Yingjun, Shen, Chao, Zhao, Yiheng, Hong, Bingzhou, Chu, Wei, Zhang, Junwen, Cai, Haiwen, and Chi, Nan
- Subjects
Physics - Optics ,Electrical Engineering and Systems Science - Signal Processing - Abstract
The escalating demands of compute-intensive applications, including artificial intelligence, urgently necessitate the adoption of sophisticated optical on-chip interconnect technologies to overcome critical bottlenecks in scaling future computing systems. This transition requires leveraging the inherent parallelism of wavelength and mode dimensions of light, complemented by high-order modulation formats, to significantly enhance data throughput. Here we experimentally demonstrate a novel synergy of these three dimensions, achieving multi-tens-of-terabits-per-second on-chip interconnects using ultra-broadband, multi-mode digital metamaterials. Employing a highly efficient edge-guided analog-and-digital optimization method, we inversely design foundry-compatible, robust, and multi-port digital metamaterials with an 8xhigher computational efficiency. Using a packaged five-mode multiplexing chip, we demonstrate a single-wavelength interconnect capacity of 1.62 Tbit s-1 and a record-setting multi-dimensional interconnect capacity of 38.2 Tbit s-1 across 5 modes and 88 wavelength channels. A theoretical analysis suggests that further system optimization can enable on-chip interconnects to reach sub-petabit-per-second data transmission rates. This study highlights the transformative potential of optical interconnect technologies to surmount the constraints of electronic links, thus setting the stage for next-generation datacenter and optical compute interconnects.
- Published
- 2024