Abstract

We demonstrate that a dielectric anapole resonator on a metallic mirror can enhance the third harmonic emission by two orders of magnitude compared to a typical anapole resonator on an insulator substrate. By employing a gold mirror under a silicon nanodisk, we introduce a novel characteristic of the anapole mode through the spatial overlap of resonantly excited Cartesian electric and toroidal dipole modes. This is a remarkable improvement on the early demonstrations of the anapole mode in which the electric and toroidal modes interfere off-resonantly. Therefore, our system produces a significant near-field enhancement, facilitating the nonlinear process. Moreover, the mirror surface boosts the nonlinear emission via the free-charge oscillations within the interface, equivalent to producing a mirror image of the nonlinear source and the pump beneath the interface. We found that these improvements result in an extremely high experimentally obtained efficiency of 0.01%.

Details

Title
Boosting third-harmonic generation by a mirror-enhanced anapole resonator
Author
Xu, Lei 1 ; Rahmani, Mohsen 2 ; Khosro Zangeneh Kamali 2   VIAFID ORCID Logo  ; Lamprianidis, Aristeidis 2 ; Ghirardini, Lavinia 3 ; Sautter, Jürgen 4 ; Camacho-Morales, Rocio 2 ; Chen, Haitao 2 ; Parry, Matthew 2 ; Staude, Isabelle 5 ; Zhang, Guoquan 6 ; Neshev, Dragomir 2   VIAFID ORCID Logo  ; Miroshnichenko, Andrey E 1   VIAFID ORCID Logo 

1  School of Engineering and Information Technology, University of New South Wales, Canberra, ACT, Australia 
2  Nonlinear Physics Centre, The Australian National University, Canberra, ACT, Australia 
3  Nonlinear Physics Centre, The Australian National University, Canberra, ACT, Australia; Department of Physics, Politecnico di Milano, Milan, Italy 
4  Nonlinear Physics Centre, The Australian National University, Canberra, ACT, Australia; Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Jena, Germany 
5  Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Jena, Germany 
6  The MOE Key Laboratory of Weak Light Nonlinear Photonics, School of Physics and TEDA Applied Physics Institute, Nankai University, Tianjin, China 
Pages
1-8
Publication year
2018
Publication date
Jul 2018
Publisher
Springer Nature B.V.
e-ISSN
20477538
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41377-018-0051-8
ProQuest document ID
2075526305
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.