Direct Detection of Optical Forces of Magnetic Nature in Dielectric Nanoantennas

Poblet，Martin1; Li，Yi2; Cortés，Emiliano3; Maier，Stefan A.3,4; Grinblat，Gustavo1; Bragas，Andrea V.1

2020-10-14

10.1021/acs.nanolett.0c03157

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Optical forces on nanostructures are usually characterized by their interaction with the electric field component of the light wave, given that most materials present negligible magnetic response at optical frequencies. This is not the case however of a high-refractive-index dielectric nanoantenna, which has been recently shown to efficiently support both electric and magnetic optical modes. In this work, we use a photoinduced force microscopy configuration to measure optically induced forces produced by a germanium nanoantenna on a surrounding silicon near-field probe. We reveal the spatial distribution, character, and magnitude of the generated forces when exciting the nanoantenna at its anapole state condition. We retrieve optical force maps showing values of up to 20 pN, which are found to be mainly magnetic in nature, according to our numerical simulations. The results of this investigation open new pathways for the study, detection, and generation of magnetic light forces at the nanometer scale.

Anapole excitation Dielectric nanoantenna Magnetic field enhancement Photoinduced Force Microscopy

EI ; SCI

英语

NI论文

其他

PICT[2017-2534] ; PIP[112 201301 00619] ; UBACyT[20020170100432BA] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)[EXC 2089/1 -390776260] ; EPSRC["EP/P033369/1","EP/M013812/1"] ; European Commission through the ERC Starting Grant CATALIGHT[802989] ; Natural Science Foundation of Guangdong Province[2019A1515111136]

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

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

WOS:000613073900014

AMER CHEMICAL SOC

20204609477687

Electric fields ; Magnetism ; Metamaterial antennas ; Refractive index ; Electric excitation

Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Telecommunication; Radar, Radio and Television:716 ; Light/Optics:741.1 ; Nanotechnology:761

MATERIALS SCIENCE

2-s2.0-85092945379

Scopus

1.Departamento de Fı́sica,FCEN,IFIBA CONICET,Universidad de Buenos Aires,Intendente Güiraldes 2160,Argentina
2.School of Microelectronics,MOE Engineering Research Center of Integrated Circuits for Next Generation Communications,Southern University of Science and Technology,Shenzhen,518055,China
3.Faculty of Physics,Ludwig-Maximilians-Universität München,Germany
4.Department of Physics,Imperial College London,London,SW7 2AZ,United Kingdom

Poblet，Martin,Li，Yi,Cortés，Emiliano,et al. Direct Detection of Optical Forces of Magnetic Nature in Dielectric Nanoantennas[J]. NANO LETTERS,2020,20(10):7627-7634.

Poblet，Martin,Li，Yi,Cortés，Emiliano,Maier，Stefan A.,Grinblat，Gustavo,&Bragas，Andrea V..(2020).Direct Detection of Optical Forces of Magnetic Nature in Dielectric Nanoantennas.NANO LETTERS,20(10),7627-7634.

Poblet，Martin,et al."Direct Detection of Optical Forces of Magnetic Nature in Dielectric Nanoantennas".NANO LETTERS 20.10(2020):7627-7634.