Giant Enhancement of Second-Order Nonlinearity of Epsilon-near-Zero Medium by a Plasmonic Metasurface

Deng, Junhong3; Tang, Yutao3; Chen, Shumei4; Li, Kingfai3; Zayats, Anatoly, V1,2; Li, Guixin3

2020-07-08

10.1021/acs.nanolett.0c01810

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Nonlinear frequency conversion at the nanoscale is important for many applications in free space and integrated photonics. In epsilon-near-zero (ENZ) materials, second-harmonic generation (SHG) is significantly enhanced but the oblique incidence is required to address nonlinearity. To circumvent this constraint, we design a hybrid metasurface consisting of plasmonic nanostructures on an ENZ nanofilm generating strongly enhanced SHG at normal incidence in transmission. We show that the Au metaatoms on an indium-tin-oxide (ITO) layer provide an approximately 10(4)-fold experimentally measured SHG enhancement at normal incidence at the fundamental wavelength near the ENZ condition of ITO. This giant enhancement stems from reshaping the vectorial properties of the incident light near the Au nanostructures and its increased coupling to the ENZ film. The proposed hybrid ENZ metasurface offers a promising platform for developing ultracompact and efficient nonlinear optical sources at the nanoscale.

Plasmonics Nonlinear metasurfaces Second-harmonic generation Epsilon-near-zero materials

SCI ; EI

英语

NI论文

第一 ; 通讯

National Natural Science Foundation of China[91950114][11774145] ; Guangdong Provincial Innovation and Entrepreneurship Project[2017ZT07C071] ; ERC iCOMM project[789340] ; Royal Society International Exchanges Project[IES\R2\170121]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000548893200095

AMER CHEMICAL SOC

20203008979656

Nonlinear optics ; Indium compounds ; Plasmonics ; Gold ; Tin oxides ; Nanostructures ; Photonics ; Incident light

Precious Metals:547.1 ; Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Inorganic Compounds:804.2 ; Plasma Physics:932.3 ; Solid State Physics:933

MATERIALS SCIENCE

Web of Science

1.Kings Coll London, Dept Phys, London WC2R 2LS, England
2.Kings Coll London, London Ctr Nanotechnol, London WC2R 2LS, England
3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen 518055, Peoples R China

Deng, Junhong,Tang, Yutao,Chen, Shumei,et al. Giant Enhancement of Second-Order Nonlinearity of Epsilon-near-Zero Medium by a Plasmonic Metasurface[J]. NANO LETTERS,2020,20(7):5421-5427.

Deng, Junhong,Tang, Yutao,Chen, Shumei,Li, Kingfai,Zayats, Anatoly, V,&Li, Guixin.(2020).Giant Enhancement of Second-Order Nonlinearity of Epsilon-near-Zero Medium by a Plasmonic Metasurface.NANO LETTERS,20(7),5421-5427.

Deng, Junhong,et al."Giant Enhancement of Second-Order Nonlinearity of Epsilon-near-Zero Medium by a Plasmonic Metasurface".NANO LETTERS 20.7(2020):5421-5427.