Design of Energy-Efficient Cross-coupled Differential Photonic-SRAM (pSRAM) Bitcell for High-Speed On-Chip Photonic Memory and Compute Systems
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916662101409792 |
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| author | Kaiser, Md Abdullah-Al Sunder, Sugeet Mathew, Clynn Rakowski, Michal Jacob, Ajey P. Jaiswal, Akhilesh R. |
| author_facet | Kaiser, Md Abdullah-Al Sunder, Sugeet Mathew, Clynn Rakowski, Michal Jacob, Ajey P. Jaiswal, Akhilesh R. |
| contents | In this work, we propose a novel differential photonic static random access memory (pSRAM) bitcell design using fabrication-friendly photonic components. The proposed pSRAM overcomes the key limitations of traditional electrical SRAMs, which struggle with speed and power efficiency due to increasing bitline/wordline capacitance and interconnect resistance associated with long electrical wires as technology scales. By utilizing cross-coupled micro-ring resonators and differential photodiode structures, along with optical waveguides instead of traditional wordlines and bitlines, our pSRAM exhibits high-speed, and energy-efficient performance. The pSRAM bitcell demonstrates a read/write speed of 40 GHz, with a switching (static) energy consumption of approximately 0.6 pJ (0.03 pJ) per bit and a footprint of 330x290 um^2 using the GlobalFoundries 45SPCLO process node. These bitcells can be arranged into a 2D memory array, enabling large-scale, on-chip photonic memory subsystems ideal for high-speed memory, data processing and computing applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_19544 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Design of Energy-Efficient Cross-coupled Differential Photonic-SRAM (pSRAM) Bitcell for High-Speed On-Chip Photonic Memory and Compute Systems Kaiser, Md Abdullah-Al Sunder, Sugeet Mathew, Clynn Rakowski, Michal Jacob, Ajey P. Jaiswal, Akhilesh R. Optics In this work, we propose a novel differential photonic static random access memory (pSRAM) bitcell design using fabrication-friendly photonic components. The proposed pSRAM overcomes the key limitations of traditional electrical SRAMs, which struggle with speed and power efficiency due to increasing bitline/wordline capacitance and interconnect resistance associated with long electrical wires as technology scales. By utilizing cross-coupled micro-ring resonators and differential photodiode structures, along with optical waveguides instead of traditional wordlines and bitlines, our pSRAM exhibits high-speed, and energy-efficient performance. The pSRAM bitcell demonstrates a read/write speed of 40 GHz, with a switching (static) energy consumption of approximately 0.6 pJ (0.03 pJ) per bit and a footprint of 330x290 um^2 using the GlobalFoundries 45SPCLO process node. These bitcells can be arranged into a 2D memory array, enabling large-scale, on-chip photonic memory subsystems ideal for high-speed memory, data processing and computing applications. |
| title | Design of Energy-Efficient Cross-coupled Differential Photonic-SRAM (pSRAM) Bitcell for High-Speed On-Chip Photonic Memory and Compute Systems |
| topic | Optics |
| url | https://arxiv.org/abs/2503.19544 |