气候变化领域集成服务门户(CCPortal): Enhanced optical Kerr nonlinearity of graphene/Si hybrid waveguide

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DOI	10.1063/1.5064832
	Enhanced optical Kerr nonlinearity of graphene/Si hybrid waveguide
	Feng, Qi; Cong, Hui; Zhang, Bin; Wei, Wenqi; Liang, Yueyin; Fang, Shaobo; Wang, Ting; Zhang, Jianjun
发表日期	2019
ISSN	0003-6951
EISSN	1077-3118
卷号	114 期号:7
英文摘要	In this work, we experimentally study the optical Kerr nonlinearities of graphene/Si hybrid waveguides with enhanced self-phase modulation. In the case of CMOS compatible materials for nonlinear optical signal processing, Si and silicon nitride waveguides have been extensively investigated over the past decade. However, Si waveguides exhibit strong two-photon absorption (TPA) at telecommunication wavelengths, which leads to a significant reduction of the nonlinear figure-of-merit (FOM). In contrast, a silicon nitride based material system usually suppresses the TPA but simultaneously leads to the reduction of Kerr nonlinearity by one order of magnitude. Here, we introduce a graphene/Si hybrid waveguide, which maintains the optical properties and CMOS compatibility of Si waveguides, while enhancing the Kerr nonlinearity, by transferring over to the top of the waveguides. The graphene/Si waveguides are measured to have an enhanced nonlinear parameter of 510 W-1 m(-1), compared with that of the Si waveguide of 150 W-1 m(-1). An enhanced nonlinear FOM of 2.48 +/- 0.25 has been achieved, which is four times larger than that of the Si waveguide of 0.6 +/- 0.1. This work reveals the potential application of graphene/Si hybrid waveguides with high Kerr nonlinearity and FOM for nonlinear all-optical signal processing. Published under license by AIP Publishing.
学科领域	Physics
语种	英语
WOS研究方向	Physics, Applied
来源期刊	APPLIED PHYSICS LETTERS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112091
作者单位	Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Feng, Qi,Cong, Hui,Zhang, Bin,et al. Enhanced optical Kerr nonlinearity of graphene/Si hybrid waveguide[J]. 中国科学院西北生态环境资源研究院,2019,114(7).
APA	Feng, Qi.,Cong, Hui.,Zhang, Bin.,Wei, Wenqi.,Liang, Yueyin.,...&Zhang, Jianjun.(2019).Enhanced optical Kerr nonlinearity of graphene/Si hybrid waveguide.APPLIED PHYSICS LETTERS,114(7).
MLA	Feng, Qi,et al."Enhanced optical Kerr nonlinearity of graphene/Si hybrid waveguide".APPLIED PHYSICS LETTERS 114.7(2019).