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Boosting third-harmonic generation by a mirror-enhanced anapole resonator

Xu L, Rahmani M, Kamali KZ, Lamprianidis A, Ghirardini L, Sautter J, Camacho-Morales R, Chen H, Parry M, Staude I, Zhang G, Neshev D, Miroshnichenko AE (2018)

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Publication Type: Journal article

Publication year: 2018

Journal

Book Volume: 7

Article Number: 44

Journal Issue: 1

DOI: 10.1038/s41377-018-0051-8

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%.

Involved external institutions

How to cite

APA:

Xu, L., Rahmani, M., Kamali, K.Z., Lamprianidis, A., Ghirardini, L., Sautter, J.,... Miroshnichenko, A.E. (2018). Boosting third-harmonic generation by a mirror-enhanced anapole resonator. Light: Science & Applications, 7(1). https://doi.org/10.1038/s41377-018-0051-8

MLA:

Xu, Lei, et al. "Boosting third-harmonic generation by a mirror-enhanced anapole resonator." Light: Science & Applications 7.1 (2018).

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