Park, Hyo-Seung Park, Jongkil Kwak, Joon Young Hwang, Gyu-Weon Jeong, Doo-Seok Lee, Kyeong-Seok 2024-01-19T15:32:16Z 2024-01-19T15:32:16Z 2021-09-02 2021-02 2045-2322 https://pubs.kist.re.kr/handle/201004/117474 A novel nano-plasmonic sensing platform based on vertical conductive bridge was suggested as an alternative geometry for taking full advantages of unique properties of conductive junction while substantially alleviating burdens in lithographic process. The effects of various geometrical parameters on the plasmonic properties were systematically investigated. Theoretical simulation on this structure demonstrates that the presence of vertical conductive bridge with smaller diameter sandwiched between two adjacent thin nanodiscs excites a bridged mode very similar to the charge transfer plasmon and exhibits a remarkable enhancement in the extinction efficiency and the sensitivity when the electric field of incident light is parallel to the conductive bridge. Furthermore, for the electric field perpendicular to the bridge, another interesting feature is observed that two magnetic resonance modes are excited symmetrically through open-gaps on both sides of the bridge together with strongly enhanced electric field intensity, which provides a very favorable environment as a surface enhanced Raman scattering substrate for fluid analysis. These results verify a great potential and versatility of our approach for use as a nanoplasmonic sensing platform. In addition, we demonstrated the feasibility of fabrication process of vertical conductive bridge and high tunability in controlling the bridge width. English Nature Publishing Group Novel nano-plasmonic sensing platform based on vertical conductive bridge Article 10.1038/s41598-021-82899-6 1 Scientific Reports, v.11, no.1 Scientific Reports 11 1 Y scie scopus 000618049600142 2-s2.0-85100486962 Multidisciplinary Sciences Science & Technology - Other Topics Article nano-plasmonic sensing platform vertical conductive bridge charge transfer plasmon mode localized surface plasmon resonance magnetic resonance mode