Author(s): Yang, SY (Yang, Shiyu); Huang, R (Huang, Ran); Wang, WT (Wang, Wentao); Zhang, JM (Zhang, Jiaming); Liu, J (Liu, Jie); Chen, YH (Chen, Yonghui); Zhang, SC (Zhang, Shanchao); Zhang, YL (Zhang, Yongliang); Duan, JL (Duan, Jinglai)

Source: ADVANCED OPTICAL MATERIALS DOI: 10.1002/adom.202300837  Early Access Date: JUN 2023  

Abstract: Highly tunable localized surface plasmon (LSP) resonances in metal nanostructures are of great importance for manipulating light waves and enhancing light-matter interactions at the nanoscale. Here, a new type of plasmonic resonators based on hollow elliptical nanotubes, which can generate highly tunable LSP resonances in the visible frequencies, are reported. High-quality hollow gold (Au) elliptical nanotubes with fine controllable size and morphology are experimentally fabricated. Dark-field scattering measurements reveal the presence of multiple plasmon resonances including longitudinal Fabry-Perot resonances and transverse hybridized LSP resonances due to rotational symmetry breaking. Upon varying the ellipticity, the hybridized LSP resonances exhibit continuously spectral evolution behaviors, such as the hybridized modes shifting and crossing. The experimental results show good agreement with the rigorous electromagnetic modeling and Raman spectroscopic measurements. The hollow anisotropic geometries provide highly tunable plasmonic responses together with homogeneous field distributions and high surface-to-volume ratio, which hold great potential for practical applications in sensing, nonlinear optics, surface-enhanced spectroscopies, and bio-medicine.

Accession Number: WOS:001001981300001

Author Identifiers:

Author Web of Science ResearcherID ORCID Number

Wang, Wentao          0009-0005-5415-2696

ISSN: 2195-1071