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Structure-Optimized Photonic Phase-Change Memory Achieving High Storage Density and Endurance Towards Reconfigurable Telecommunication Systems

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Publicado en:Photonics vol. 12, no. 11 (2025), p. 1130-1143
Autor principal: Chen, Gao
Otros Autores: Zhou, Han, Wang, Gaofei, Huang, Wentao
Publicado:
MDPI AG
Materias:
United States > US
Germany
China
Japan
Computation
Data storage
Optimization
Photonic crystals
Data processing
Storage capacity
Phase change materials
Cylinders
Density
Energy consumption
Chips (memory devices)
Reconfiguration
Immunological memory
Computer memory
Electromagnetic absorption
Lasers
Endurance
Delay lines
Phase transitions
Arrays
Durability
Silicon wafers
Photonics
Acceso en línea:Citation/Abstract
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Resumen:Next-generation photonic memory, leveraging broad spectral operability and electromagnetic immunity, enables ultrafast data storage with high density, overcoming the physical limitations of silicon-based electronic memory in the post-Moore era. Phase-change materials (PCMs) are particularly promising for photonic memory due to their exceptional optical contrast between amorphous and crystalline states. Furthermore, photonic phase-change memory can be deployed as tunable components (such as optical attenuators and delay lines) within reconfigurable integrated photonic systems for telecommunications and computing. Here, we optimize the thickness of PCM cells to maximize crystalline-state light absorption and enhance transmission contrast. The resulting photonic memory achieves outstanding performance: ultralow-energy programming (0.96 pJ/operation), 9 fJ detection sensitivity, >105 s retention, 6000-cycle endurance, and multi-level storage capacity (209 distinct states). Furthermore, by structuring the PCM into a micro-cylinder array atop a PCM film, we achieve stable transmission contrast through 2 × 106 cycles—far exceeding the durability of single-cell structures—and an 8.69 dB improvement in contrast over film-free micro-cylinder arrays. These advances highlight the critical role of microstructural optimization in enabling high-performance, on-chip photonic memory for future integrated photonic telecommunication and computing systems.
ISSN:2304-6732
DOI:10.3390/photonics12111130
Fuente:Advanced Technologies & Aerospace Database