Visible Range Plasmonic Modes on Topological Insulator Nanostructures

• Main Authors: Dubrovkin, Alexander M., Adamo, Giorgio, Yin, Jun, Wang, Lan, Soci, Cesare, Wang, Qi Jie, Zheludev, Nikolay I.
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2017
• Subjects: Plasmonics; Chalcogenide topological insulator
• Online Access: https://hdl.handle.net/10356/83653; http://hdl.handle.net/10220/42739
• Institution: Nanyang Technological University

Phase-resolved real-space imaging of localized plasmons in Bi1.5Sb0.5Te1.8Se1.2 topological insulator nanostructures is performed by scattering-type scanning near-field optical microscopy. Dipolar and higher order surface plasmon modes with well-defined field amplitude and phase profiles are detecte...