基于硅波导的紧凑型石墨烯调制器的高调制效率。

Significantly High Modulation Efficiency of Compact Graphene Modulator Based on Silicon Waveguide.

机构信息

State Key Laboratory of Advanced Optical Communications System and Networks, Peking University, Beijing, 100871, China.

Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University, Beijing, 100871, China.

出版信息

Sci Rep. 2018 Jan 17;8(1):991. doi: 10.1038/s41598-018-19171-x.

DOI:10.1038/s41598-018-19171-x

PMID:29343755

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5772525/

Abstract

We theoretically and experimentally demonstrate a significantly large modulation efficiency of a compact graphene modulator based on a silicon waveguide using the electro refractive effect of graphene. The modulation modes of electro-absorption and electro-refractive can be switched with different applied voltages. A high extinction ratio of 25 dB is achieved in the electro-absorption modulation mode with a driving voltage range of 0 V to 1 V. For electro-refractive modulation, the driving voltage ranges from 1 V to 3 V with a 185-pm spectrum shift. The modulation efficiency of 1.29 V · mm with a 40-μm interaction length is two orders of magnitude higher than that of the first reported graphene phase modulator. The realisation of phase and intensity modulation with graphene based on a silicon waveguide heralds its potential application in optical communication and optical interconnection systems.

摘要

我们从理论和实验两方面证明了基于硅波导的紧凑型石墨烯调制器具有显著的大调制效率，这是利用了石墨烯的电光折射率效应。电光吸收和电光折射两种调制模式可以通过不同的外加电压进行切换。在电吸收调制模式下，驱动电压范围为 0 V 至 1 V 时，实现了 25 dB 的高消光比。对于电光折射调制，驱动电压范围为 1 V 至 3 V，光谱移动 185 pm。在 40 μm 的相互作用长度下，调制效率为 1.29 V·mm，比第一个报道的基于石墨烯的相位调制器高两个数量级。基于硅波导的石墨烯实现的相位和强度调制预示着其在光通信和光互连系统中的潜在应用。