Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation

doi:10.1038/s41467-018-05081-z

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	Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation
	Vermeulen, N.; Castello-Lurbe, D.; Khoder, M.; Pasternak, I.; Krajewska, A.; Ciuk, T.; Strupinski, W.; Cheng, J. L.; Thienpont, H.; Van Erps, J.
	2018
发表期刊	Nature Communications
ISSN	2041-1723
卷号	9 页码:9
摘要	Graphene is considered a record-performance nonlinear-optical material on the basis of numerous experiments. The observed strong nonlinear response ascribed to the refractive part of graphene's electronic third-order susceptibility chi((3)) cannot, however, be explained using the relatively modest chi((3)) value theoretically predicted for the 2D material. Here we solve this long-standing paradox and demonstrate that, rather than chi((3))-based refraction, a complex phenomenon which we call saturable photoexcited-carrier refraction is at the heart of nonlinear-optical interactions in graphene such as self-phase modulation. Saturable photoexcited-carrier refraction is found to enable self-phase modulation of picosecond optical pulses with exponential-like bandwidth growth along graphene-covered waveguides. Our theory allows explanation of these extraordinary experimental results both qualitatively and quantitatively. It also supports the graphene nonlinearities measured in previous self-phase modulation and self-(de) focusing (Z-scan) experiments. This work signifies a paradigm shift in the understanding of 2D-material nonlinearities and finally enables their full exploitation in next-generation nonlinear-optical devices.
关键词	silicon wave-guides z-scan measurement refractive-index generation optoelectronics enhancement absorption mos2 Science & Technology - Other Topics
DOI	10.1038/s41467-018-05081-z
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60675
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Vermeulen, N.,Castello-Lurbe, D.,Khoder, M.,et al. Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation[J]. Nature Communications,2018,9:9.
APA	Vermeulen, N..,Castello-Lurbe, D..,Khoder, M..,Pasternak, I..,Krajewska, A..,...&Van Erps, J..(2018).Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation.Nature Communications,9,9.
MLA	Vermeulen, N.,et al."Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation".Nature Communications 9(2018):9.