Exploring topological phenomenon in rf circuits
In this project, we aim to design and experimentally demonstrate topological phenomena in RF circuits. In particular, we will realize both two dimensional (2D) linear topological circuits showing nontrivial edge states immune from circuit defects and disorders, and nonlinear topological circuits whose topological properties can be controlled by the intensity of the input signal. To utilize the robustness nature of topological circuit, we will also fabricate flexible topological circuit on top of polyimide (PI) or polyethylene terephthalate (PET) films, where the topological features of circuit are preserved when the circuit is bent or stretched. 3D topological circuit will also be theoretically and numerically investigated to achieve exotic topological phases such as nodal lines and Weyl states at RF frequency. This project will provide not only possibilities for designing novel RF circuits that could function properly under different types of circuit defects and tolerance, but also a new platform for exploring and experimentally demonstrating topological phenomena with ease and low cost.