Efficient ultrafast all-optical modulation in a nonlinear crystalline gallium phosphide nanodisk at the anapole excitation

Grinblat, Gustavo1; Zhang, Haizhong2; Nielsen, Michael P.3; Krivitsky, Leonid2; Berte, Rodrigo4; Li, Yi4,5; Tilmann, Benjamin4; Cortes, Emiliano4; Oulton, Rupert F.6; Kuznetsov, Arseniy, I2; Maier, Stefan A.4,6

2020-08

10.1126/sciadv.abb3123

Science Advances   影响因子和分区

2375-2548

High-refractive index nanostructured dielectrics have the ability to locally enhance electromagnetic fields with low losses while presenting high third-order nonlinearities. In this work, we exploit these characteristics to achieve efficient ultrafast all-optical modulation in a crystalline gallium phosphide (GaP) nanoantenna through the optical Kerr effect (OKE) and two-photon absorption (TPA) in the visible/near-infrared range. We show that an individual GaP nanodisk can yield differential reflectivity modulations of up to similar to 40%, with characteristic modulation times between 14 and 66 fs, when probed at the anapole excitation (AE). Numerical simulations reveal that the AE represents a unique condition where both the OKE and TPA contribute with the same modulation sign, maximizing the response. These findings highly outperform previous reports on sub-100-fs all-optical switching from resonant nanoscale dielectrics, which have demonstrated modulation depths no larger than 0.5%, placing GaP nanoantennas as a promising choice for ultrafast all-optical modulation at the nanometer scale.

SCI ; EI

英语

NI论文

其他

A*STAR SERC Pharos program (Singapore)[152 73 00025] ; PICT[2017-2534] ; Deutsche Forschungsgemeinschaft (German's Excellence Strategy)[EXC 2089/1-390776260] ; EPSRC[EP/M013812/1] ; European Union's Framework Programme for Research and Innovation Horizon 2020 (2014-2020) under the Marie Sklodowska-Curie grant[754388]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000561426700022

AMER ASSOC ADVANCEMENT SCIENCE

20203909245083

Nonlinear optics ; Refractive index ; Light modulation ; Optical switches ; Luminescence of organic solids ; Two photon processes ; Electromagnetic fields ; Gallium arsenide ; Optical Kerr effect ; Optical signal processing ; Gallium phosphide

Electricity and Magnetism:701 ; Semiconducting Materials:712.1 ; Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Optical Devices and Systems:741.3 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2

Web of Science

1.Univ Buenos Aires, CONICET, FCEN, Dept Fis,IFIBA, Buenos Aires, DF, Argentina
2.ASTAR, Inst Mat Res & Engn, Singapore 138634, Singapore
3.Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia
4.Ludwig Maximilians Univ Munchen, Chair Hybrid Nanosyst, Fak Phys, Nanoinst Munchen, D-80539 Munich, Germany
5.Southern Univ Sci & Technol, MOE Engn Res Ctr Integrated Circuits Next Generat, Sch Microelect, Shenzhen 518055, Guangdong, Peoples R China
6.Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England

Grinblat, Gustavo,Zhang, Haizhong,Nielsen, Michael P.,et al. Efficient ultrafast all-optical modulation in a nonlinear crystalline gallium phosphide nanodisk at the anapole excitation[J]. Science Advances,2020,6(34).

Grinblat, Gustavo.,Zhang, Haizhong.,Nielsen, Michael P..,Krivitsky, Leonid.,Berte, Rodrigo.,...&Maier, Stefan A..(2020).Efficient ultrafast all-optical modulation in a nonlinear crystalline gallium phosphide nanodisk at the anapole excitation.Science Advances,6(34).

Grinblat, Gustavo,et al."Efficient ultrafast all-optical modulation in a nonlinear crystalline gallium phosphide nanodisk at the anapole excitation".Science Advances 6.34(2020).