Quantum Valley Hall Effect-Based Coupler with Continuously Tunable Transmission for Topological Information Communication.

ABSTRACT: Topological insulators have taken classical wave systems to the next level by their unique characteristics such as highly efficient, robust, and unidirectional wave propagation. As a step further, tunability in fundamental building blocks such as couplers is desired toward topological integrated circuits and communication systems. However, most of existing topologically protected couplers exhibit a constant transmission coefficient within the bandgap, and achieving continuously tunable transmission coefficients remains challenging. Here it is experimentally showed that a four-port coupler consisting of quantum valley Hall effect-based waveguides can exhibit continuously tunable transmission coefficients from one input port to each of the two output ports over the bandgap, while the rest po

SUBMITTER: Funayama K 

PROVIDER: S-EPMC12462939 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature