Abstract
Nanowires (NWs) are essential building blocks of photonic devices for guiding light waves. However, the controlled synthesis of non-circular NWs remains challenging. Herein, we develop a bottom-up approach for the fabrication of high-quality elliptical gold NWs with finely tuned geometry engineering by using an advanced ion-track template technology. Compared to ordinary NWs, the rotational symmetry breaking leads to highly polarization-dependent plasmonic responses. Modal analysis shows that the lowest dipolar HE1 mode splits into two branches where the attenuation of the long-range branch decreases by 40%, while the short-range branch has a stronger enhanced near-field. Novel, to the best of our knowledge, plasmonic Fabry–Pérot resonances on finite NWs are measured. Our method can be extended to fabricate non-circular NWs with other materials, holding potential for novel applications from quantum to collective scales.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Chenglong Zhang, Ziwei Liu, Chen Cai, Zehao Yang, and Zhi-Mei Qi
Opt. Lett. 47(16) 4155-4158 (2022)
Tomasz Matthia, Baptiste Fix, Léna Soun, Christophe Dupuis, Nathalie Bardou, and Patrick Bouchon
Opt. Lett. 47(17) 4415-4418 (2022)
Pintu Ghosh, Jinsheng Lu, Hao Luo, Ziquan Xu, Xiaoyuan Yan, Yewu Wang, Jun Lu, Min Qiu, and Qiang Li
Opt. Lett. 43(10) 2422-2425 (2018)