Device-Level Photonic Memories and Logic Applications Using Phase-Change Materials
Device-Level Photonic Memories and Logic Applications Using Phase-Change Materials
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DOI：
10.1002/adma.201802435
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发表时间：
2018-08-09
影响因子：
29.4
通讯作者：
Bhaskaran, Harish
中科院分区：
文献类型：
--
作者：
Cheng, Zengguang;Rios, Carlos;Bhaskaran, Harish
受光纤在超快数据传输中的巨大成功的启发，光子计算正在被广泛研究，作为替代或混合电子计算机的替代方案，这些计算机正在达到速度和带宽的限制。在光子器件上模拟和实现基本的计算元件是迈向全光计算机的第一步，也是必不可少的一步。在这里，光脉冲宽度调制（PWM）开关的相变材料上的集成波导的开发，这使得光子存储器和逻辑器件的实际实施。研究表明，低峰值功率的脉宽调制在能量效率和工艺控制方面对相变材料的再结晶是非常有效的。利用这种理解，然后实现具有完全随机可访问性的多级光子存储器。最后，可编程光学逻辑器件的概念和实验证明，与逻辑或和NAND实现在一个单一的集成光子相变单元。这项研究提供了一个实用和优雅的技术，光学编程光子相变器件的计算应用。
Inspired by the great success of fiber optics in ultrafast data transmission, photonic computing is being extensively studied as an alternative to replace or hybridize electronic computers, which are reaching speed and bandwidth limitations. Mimicking and implementing basic computing elements on photonic devices is a first and essential step toward all-optical computers. Here, an optical pulse-width modulation (PWM) switching of phase-change materials on an integrated waveguide is developed, which allows practical implementation of photonic memories and logic devices. It is established that PWM with low peak power is very effective for recrystallization of phase-change materials, in terms of both energy efficiency and process control. Using this understanding, multilevel photonic memories with complete random accessibility are then implemented. Finally, programmable optical logic devices are demonstrated conceptually and experimentally, with logic OR and NAND achieved on just a single integrated photonic phase-change cell. This study provides a practical and elegant technique to optically program photonic phase-change devices for computing applications.