Hao Ran, Ye Ziwei, Gu YiJie, Peng Xiliang, Chen Hongsheng, Li Erping
Key Lab of Micro/Nano_Electronic Devices and Smart Systems, College of Information Science & Electronic Engineering, Zhejiang University, Hangzhou, 310027, China.
Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining, 314400, China.
Sci Rep. 2018 Nov 15;8(1):16830. doi: 10.1038/s41598-018-34914-6.
We present an effective scheme to improve the modulation capacity in graphene-based silicon modulator by employing the double slots configuration with hybrid plasmonic effects. Two modulators, i.e., metal-insulator-metal and insulator-metal-insulator configurations have been demonstrated, showing that the double slots design can significantly improve the modulation efficiency. The obtained modulation efficiency is up to 0.525 dB/μm per graphene layer, far exceeding previous studies. It can be found that the light-graphene interaction plays a pivotal role in the modulation efficiency, whereas the height of metal has profound influence on the modulation. Our results may promote various future modulation devices based on graphene.
我们提出了一种有效的方案,通过采用具有混合等离子体效应的双槽结构来提高基于石墨烯的硅调制器的调制能力。已经展示了两种调制器,即金属-绝缘体-金属和绝缘体-金属-绝缘体结构,结果表明双槽设计可以显著提高调制效率。所获得的调制效率高达每石墨烯层0.525 dB/μm,远远超过先前的研究。可以发现,光与石墨烯的相互作用在调制效率中起着关键作用,而金属的高度对调制有深远影响。我们的结果可能会推动未来各种基于石墨烯的调制器件的发展。