Low-power 7-bit hybrid volatile/ nonvolatile tuning of ring resonators
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909423224487936 |
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| author | Dutta, Jayita Chen, Rui Tara, Virat MAjumdar, Arka |
| author_facet | Dutta, Jayita Chen, Rui Tara, Virat MAjumdar, Arka |
| contents | Programmable photonic integrated circuits are expected to play an increasingly important role to enable high-bandwidth optical interconnects, and large-scale in-memory computing as needed to support the rise of artificial intelligence and machine learning technology. To that end, chalcogenide-based non-volatile phase-change materials (PCMs) present a promising solution due to zero static power. However, high switching voltage and small number of operating levels present serious roadblocks to widespread adoption of PCM-programmble units. Here, we demonstrate electrically programmable wide bandgap Sb2S3-clad silicon ring resonator using silicon microheater at CMOS compatible voltage of < 3V. Our device shows low switching energy of 35.33 nJ (0.48 mJ) for amorphization (crystallization) and reversible phase transitions with high endurance (> 2000 switching events) near 1550 nm. Combining volatile thermo-optic effect with non-volatile PCMs, we demonstrate 7-bit (127 levels) operation with excellent repeatability and reduced power consumption. Our demonstration of low-voltage and low-energy operation, combined with the hybrid volatilenonvolatile approach, marks a significant step towards integrating PCM-based programmable units in large-scale optical interconnects. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_07447 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Low-power 7-bit hybrid volatile/ nonvolatile tuning of ring resonators Dutta, Jayita Chen, Rui Tara, Virat MAjumdar, Arka Optics Applied Physics Programmable photonic integrated circuits are expected to play an increasingly important role to enable high-bandwidth optical interconnects, and large-scale in-memory computing as needed to support the rise of artificial intelligence and machine learning technology. To that end, chalcogenide-based non-volatile phase-change materials (PCMs) present a promising solution due to zero static power. However, high switching voltage and small number of operating levels present serious roadblocks to widespread adoption of PCM-programmble units. Here, we demonstrate electrically programmable wide bandgap Sb2S3-clad silicon ring resonator using silicon microheater at CMOS compatible voltage of < 3V. Our device shows low switching energy of 35.33 nJ (0.48 mJ) for amorphization (crystallization) and reversible phase transitions with high endurance (> 2000 switching events) near 1550 nm. Combining volatile thermo-optic effect with non-volatile PCMs, we demonstrate 7-bit (127 levels) operation with excellent repeatability and reduced power consumption. Our demonstration of low-voltage and low-energy operation, combined with the hybrid volatilenonvolatile approach, marks a significant step towards integrating PCM-based programmable units in large-scale optical interconnects. |
| title | Low-power 7-bit hybrid volatile/ nonvolatile tuning of ring resonators |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2412.07447 |