Mixed-Mode Operation of Hybrid Phase-Change Nanophotonic Circuits
Mixed-Mode Operation of Hybrid Phase-Change Nanophotonic Circuits
复制标题
混合相变纳米光子电路的混合模式操作
DOI：
10.1021/acs.nanolett.6b03688
复制
发表时间：
2017-01-01
期刊：
影响因子：
10.8
通讯作者：
Agarwal, Ritesh
中科院分区：
文献类型：
--
作者：
Lu, Yegang;Stegmaier, Matthias;Agarwal, Ritesh
相变材料(PCM)由于具有超快、可逆相变、长期耐久和纳米尺度的高可伸缩性等特点，在非易失性电和全光存储领域具有极大的吸引力。了解它们在电域和光域相变时的暂态特性，对于在未来的多功能光电子电路中使用相变材料是至关重要的。在这里，我们使用嵌入到纳米光子电路中的PCM纳米线来研究混合模式操作中的开关动力学。光在光波导和相变纳米线之间的短暂耦合使非晶态和晶态之间的可逆相变成为可能。我们对纳米线的光传输和电阻的瞬时变化进行了时间分辨测量，并显示了在光域和电域的可逆开关操作。我们的结果为片上多功能光电集成器件、波导集成存储器和混合处理应用铺平了道路。
Phase change materials (PCMs) are highly attractive for nonvolatile electrical and all-optical memory 1 applications because of unique features such as ultrafast and reversible phase transitions, long-term endurance, and high scalability to nanoscale dimensions. Understanding their transient characteristics upon phase transition in both the electrical and the optical domains is essential for using PCMs in future multifunctional optoelectronic circuits. Here, we use a PCM nanowire embedded into a nanophotonic circuit to study switching dynamics in mixed-mode operation. Evanescent coupling between light traveling along waveguides and a phase change nanowire enables reversible phase transition between amorphous and crystalline states. We perform time-resolved measurements of the transient change in both the optical transmission and resistance of the nanowire and show reversible switching operations in both the optical and the electrical domains. Our results pave the way toward on-chip multifunctional optoelectronic integrated devices, waveguide integrated memories, and hybrid processing applications.