Doping-Induced Second-Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response

doi:10.1103/PhysRevLett.122.047401

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	Doping-Induced Second-Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response
	Y.Zhang; D.Huang; Y.W.Shan; T.Jiang; Z.H.Zhang; K.H.Liu
	2019
发表期刊	Physical Review Letters
ISSN	0031-9007
卷号	122 期号:4 页码:6
摘要	For centrosymmetric materials such as monolayer graphene, no optical second-harmonic generation (SHG) is generally expected, because it is forbidden under the electric-dipole approximation. Yet we observe a strong, doping-induced SHG from graphene, with its highest strength comparable to the electric-dipole-allowed SHG in noncentrosymmetric 2D materials. This novel SHG has the nature of an electric-quadrupole response, arising from the effective breaking of inversion symmetry by optical dressing with an in-plane photon wave vector. More remarkably, the SHG is widely tuned by carrier doping or chemical potential, being sharply enhanced at Fermi-edge resonances but vanishing at the charge neutral point that manifests the electron-hole symmetry of massless Dirac fermions. This striking behavior in graphene, which should also arise in graphenelike Dirac materials, expands the scope of nonlinear optics and holds the promise of novel optoelectronic and photonic applications.
关键词	surface,mos2,Physics
DOI	10.1103/PhysRevLett.122.047401
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62777
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	Y.Zhang,D.Huang,Y.W.Shan,et al. Doping-Induced Second-Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response[J]. Physical Review Letters,2019,122(4):6.
APA	Y.Zhang,D.Huang,Y.W.Shan,T.Jiang,Z.H.Zhang,&K.H.Liu.(2019).Doping-Induced Second-Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response.Physical Review Letters,122(4),6.
MLA	Y.Zhang,et al."Doping-Induced Second-Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response".Physical Review Letters 122.4(2019):6.

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