Author(s): Wu, XX (Wu, Xian-Xin); Jiang, WY (Jiang, Wen-Yu); Wang, XF (Wang, Xiao-Feng); Zhao, LY (Zhao, Li-Yun); Shi, J (Shi, Jia); Zhang, S (Zhang, Shuai); Sui, XY (Sui, Xinyu); Chen, ZX (Chen, Zhe-Xue); Du, WN (Du, Wen-Na); Shi, JW (Shi, Jian-Wei); Liu, Q (Liu, Qian); Zhang, Q (Zhang, Qing); Zhang, Y (Zhang, Yong); Liu, XF (Liu, Xin-Feng)

Source: ACS NANO Volume: 15 Issue: 1 Pages: 1291-1300 DOI: 10.1021/acsnano.0c08498 Published: JAN 26 2021

Abstract: Second-harmonic generation (SHG) in plasmonic nanostructures has been investigated for decades due to their wide applications in photonic circuit, quantum optics and biosensing. Development of large-scale, uniform, and efficient plasmonic nanostructure system with tunable modes is desirable for their feasible utilizations. Herein, we design an efficient inch-scale SHG source by a solution-processed method instead of traditional high-cost processes. By assembling the gold nanoparticles with the porous anodic alumina templates, multiresonance in both visible and near-infrared regions can be achieved in hexagonal plasmonic nanostructure arrays, which provide strong electric field enhancement at the gap region. Polarization-independence SHG radiation has been realized owing to the in-plane isotropic characteristic of assembled unit. The tilt-angle dependent and angle-resolved measurement showed that wide-angle nonlinear response is achieved in our device because of the gap geometry of ball-in-bowl nanostructure with nonlinear emission electric dipoles distributed on the concave surface, which makes it competitive in practical applications. Our progress not only makes it possible to produce uniform inch-scale nonlinear arrays through low-cost solution process; and also advances the understanding of the SHG radiation in plasmonic nanostructures.

Accession Number: WOS:000613942700100

PubMed ID: 33373181

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Zhang, Yong         N-1915-2013

ISSN: 1936-0851

eISSN: 1936-086X

Full Text: https://pubs.acs.org/doi/10.1021/acsnano.0c08498