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arXiv 1907.04085physics.opticsphysics.app-phphysics.pop-ph
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基于全介质混合silicon-Ge2Sb2Te5超材料的全光开关和逻辑门

All-optical switch and logic gates based on all-dielectric hybrid silicon-Ge2Sb2Te5 metamaterials

Zhaojian Zhang, Junbo Yang, Wei Bai, Yunxin Han, Xin He, Jie Huang, Dingbo Chen, Siyu Xu, Wanlin Xie

摘要:

提出了一种全介质混合超材料(MM),用于实现短波红外(SWIR)波段的全光开关和逻辑门。这种MM由一个硅棒和一个Ge 2Sb 2 Te 5(GST)棒对组成。利用GST从非晶态到晶态的转变,这种MM可以产生具有主动控制的电磁感应透明(EIT)类似物。在此基础上,实现了1500 nm波长的全光开关,调制深度为84%。此外,该器件还可以同时实现非、或、或三种不同的逻辑门。由于GST具有快速的相变过程,该器件具有快速的响应时间和可重构能力,在未来的光网络中具有潜在的应用前景。

英文摘要:

We numerically propose an all-dielectric hybrid metamaterial (MM) to realize all-optical switch and logic gates in shortwave infrared (SWIR) band. Such MM consists of one silicon rod and one Ge2Sb2Te5 (GST) rod pair. Utilizing the transition from amorphous to crystalline state of GST, such MM can produce electromagnetically induced transparency (EIT) analogue with active control. Based on this, we realized all-optical switching at 1500 nm with a modulation depth 84%. Besides, three different logic gates, NOT, NOR and OR, can also be achieved in this device simultaneously. Thanks to the reversible and fast phase transition process of GST, this device possesses reconfigurable ability as well as fast response time, and has potential applications in future optical networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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