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Nonlinear optical phenomena with polarization-dependent characteristics are pivotal for the advancement of integrated photonic devices. We present the remarkable second-harmonic generation (SHG) with pronounced polarization anisotropy, achieved through meticulously engineered silver (Ag) nanoparticle (NP) arrays. These arrays are fabricated beneath the surface of SiO2 substrates using a combination of Ag+ ion implantation and swift heavy-ion irradiation, resulting in a uniform orientation across centimeter-scale areas. The engineered arrays exhibit polarization-sensitive plasmonic optical responses across both the visible and near-infrared spectra, demonstrating a distinct polarization-dependent SHG response with an impressive anisotropy ratio of up to 25. Notably, the SHG intensity from the tailored Ag NP arrays is comparable to that of two-dimensional transition metal dichalcogenides. The unique polarization-dependent nonlinearity offered by these extensive Ag NP arrays presents significant potential for integrated nonlinear photonic applications that harness polarization functionality.

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  This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Lingrui Chu, Rang Li, Han Zhu, Weijie Liu, Hiroshi Amekura, Norito Ishikawa, Nariaki Okubo, Xiaoli Sun, Feng Chen; Tailored silver nanoparticle arrays for enhanced polarization-anisotropic second-harmonic emission. Appl. Phys. Lett. 14 July 2025; 127 (2): 023101 and may be found at https://doi.org/10.1063/5.0263702.

Keyword: second harmonic generation, shape elongation, nanoparticle, swift heavy ion

Date published: 2025-07-14

Publisher: AIP Publishing

Journal:

• Applied Physics Letters (ISSN: 00036951) vol. 127 issue. 2 023101

Funding:

• National Natural Science Foundation of China 12235009
• Taishan Scholar Project of Shandong Province tspd20210303
• Japan Society for the Promotion of Science 22K04990

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5589

First published URL: https://doi.org/10.1063/5.0263702

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Updated at: 2025-07-16 08:30:44 +0900

Published on MDR: 2025-07-16 08:17:07 +0900