Sharp Toroidal Resonances in Planar Terahertz Metasurfaces

• Main Authors: Gupta, Manoj, Savinov, Vassili, Xu, Ningning, Cong, Longqing, Dayal, Govind, Wang, Shuang, Zhang, Weili, Zheludev, Nikolay I., Singh, Ranjan
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2017
• Subjects: Metasurfaces; Magnetic Coupling
• Online Access: https://hdl.handle.net/10356/83782; http://hdl.handle.net/10220/42751; https://doi.org/10.21979/N9/UWBOGJ
• Institution: Nanyang Technological University

A toroidal dipole in metasurfaces provides an alternate approach for the excitation of high-Q resonances. In contrast to conventional multipoles, the toroidal dipole interaction strength depends on the time derivative of the surrounding electric field.