In this one-hour seminar, Yandong Li, Cornell University, will be presenting a talk titled: “Topological Directional Coupler Based on a Designer Domain Wall.”
Abstract – Nobel laureate H. Kroemer’s famous quote in 2000, “The interface is the device”, summarized the historic success of semiconductors. For the following two decades, the dictionary of new materials has been greatly enriched. With topological insulators, artificial metamaterials, moiré superlattices, etc., we expect versatile, robust, and compact photonic and electronic components to emerge.
In this talk, I will present a topological directional coupler that couples edge modes in a tunable way while maintaining their unidirectionality. The first part will focus on the design, the theoretical analysis, and, particularly, the idea of interfering and programming topological modes by intentionally breaking or relaxing the corresponding symmetry. Then, I will present the experimental results of a classical Rabi oscillation performed by this topological directional coupler. I will conclude with the future prospects of this design and its potential applications in building large-scale efficient, robust, and compact optical computing machinery.
Bio – Yandong Li is a PhD candidate under the supervision of Prof. Gennady Shvets in the School of Applied and Engineering at Cornell University. He received his BSc in Engineering Physics from Case Western Reserve University in 2016. His research interest spans topological photonics, metamaterials, and optical computing.
This seminar will be presented in the 5th fl Data Viz Room, with the option to join online via Zoom.
To join via Zoom:
ID 858 5234 0862
Passcode 723514
For further information, please contact:
Leah Abraha
labraha@gc.cuny.edu