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题名	Time-Dependent Ultrafast Quadratic Nonlinearity in an Epsilon-Near-Zero Platform
作者	Bykov, Anton Yu.1,2; Deng, Junhong3 ; Li, Guixin4 ; Zayats, Anatoly V.1,2
通讯作者	Bykov, Anton Yu.
发表日期	2024-03-14
DOI	10.1021/acs.nanolett.4c00282
发表期刊	NANO LETTERS 影响因子和分区
ISSN	1530-6984
EISSN	1530-6992
卷号	24 期号:12
摘要	Ultrafast nonlinearity, which results in modulation of the linear optical response, is a basis for the development of time-varying media, in particular those operating in the epsilon-near-zero (ENZ) regime. Here, we demonstrate that the intraband excitation of hot electrons in the ENZ film results in a second-harmonic resonance shift of similar to 10 THz (40 nm) and second-harmonic generation (SHG) intensity changes of >100% with only minor (<1%) changes in linear transmission. The modulation is 10-fold enhanced by a plasmonic metasurface coupled to a film, allowing for ultrafast modulation of circularly polarized SHG. The effect is described by the plasma frequency renormalization in the ENZ material and the modification of the electron damping, with a possible influence of the hot-electron dynamics on the quadratic susceptibility. The results elucidate the nature of the second-order nonlinearity in ENZ materials and pave the way to the rational engineering of active nonlinear metamaterials and metasurfaces for time-varying applications.
关键词	hot-carrier dynamics epsilon-near-zero materials plasmonic metasurfaces second harmonic generation ultrafast all-optical modulation
相关链接	[来源记录]
收录类别	SCI
语种	英语
重要成果	NI期刊
学校署名	其他
资助项目	European Commission[789340] ; ERC iCOMM project[EP/Y015673/1]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001185151800001
出版者	AMER CHEMICAL SOC
ESI学科分类	MATERIALS SCIENCE
来源库	Web of Science
引用统计
成果类型	期刊论文
条目标识符	http://kc.sustech.edu.cn/handle/2SGJ60CL/788946
专题	量子科学与工程研究院工学院_材料科学与工程系
作者单位	1.Kings Coll London, Dept Phys, London WS2R 2LS, England 2.Kings Coll London, London Ctr Nanotechnol, London WS2R 2LS, England 3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China 4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Bykov, Anton Yu.,Deng, Junhong,Li, Guixin,et al. Time-Dependent Ultrafast Quadratic Nonlinearity in an Epsilon-Near-Zero Platform[J]. NANO LETTERS,2024,24(12).
APA	Bykov, Anton Yu.,Deng, Junhong,Li, Guixin,&Zayats, Anatoly V..(2024).Time-Dependent Ultrafast Quadratic Nonlinearity in an Epsilon-Near-Zero Platform.NANO LETTERS,24(12).
MLA	Bykov, Anton Yu.,et al."Time-Dependent Ultrafast Quadratic Nonlinearity in an Epsilon-Near-Zero Platform".NANO LETTERS 24.12(2024).