Description
Manipulating mass diffusion is essential for applications ranging from drug delivery to pollution control, yet conventional diffusion cloaks are fundamentally limited in high-diffusivity environments and often require impractical anisotropic materials. Here, we reinterpret rotational convection through homogenization theory and show that it effectively mimics a concentration near-zero-index (NZI) medium. By combining this active transport mechanism with pseudoconformal mapping, we realize an isotropic concentration cloak that preserves the background field while enabling the cloaked region to respond to external concentration changes in real time.
Primary author
Yuqian Zhao
(fudan university)
