Gate-tunable third-order nonlinear optical response of massless Dirac fermions in graphene

doi:10.1038/s41566-018-0175-7

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	Gate-tunable third-order nonlinear optical response of massless Dirac fermions in graphene
	Jiang, T.; Huang, D.; Cheng, J. L.; Fan, X. D.; Zhang, Z. H.; Shan, Y. W.; Yi, Y. F.; Dai, Y. Y.; Shi, L.; Liu, K. H.
刊名	Nature Photonics
	2018
卷号	12 期号:7 页码:430-+
关键词	single-crystal graphene refractive-index optoelectronics generation microscopy scattering growth Optics Physics
ISSN号	1749-4885
DOI	10.1038/s41566-018-0175-7
英文摘要	Graphene with massless Dirac fermions can have exceptionally strong third-order optical nonlinearities. Yet reported values of nonlinear optical susceptibilities for third-harmonic generation (THG), four-wave mixing (FWM) and self-phase modulation vary over six orders of magnitude. Such variation likely arises from frequency-dependent resonance effects of different processes in graphene under different doping. Here, we report an experimental study of THG and FWM in graphene using gate tuning to adjust the doping level and vary the resonant condition. We find that THG and sum-frequency FWM are strongly enhanced in heavily doped graphene, while the difference-frequency FWM appears just the opposite. Difference-frequency FWM exhibited a novel divergence towards the degenerate case in undoped graphene, leading to a giant enhancement of the nonlinearity. The results are well supported by theory. Our full understanding of the diverse nonlinearity of graphene paves the way towards future design of graphene-based nonlinear optoelectronic devices.
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/61001]
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	Jiang, T.,Huang, D.,Cheng, J. L.,et al. Gate-tunable third-order nonlinear optical response of massless Dirac fermions in graphene[J]. Nature Photonics,2018,12(7):430-+.
APA	Jiang, T..,Huang, D..,Cheng, J. L..,Fan, X. D..,Zhang, Z. H..,...&Wu, S. W..(2018).Gate-tunable third-order nonlinear optical response of massless Dirac fermions in graphene.Nature Photonics,12(7),430-+.
MLA	Jiang, T.,et al."Gate-tunable third-order nonlinear optical response of massless Dirac fermions in graphene".Nature Photonics 12.7(2018):430-+.