MXene Loss Engineering for Anti‐Parity‐Time Plasmonic Skyrmions

ABSTRACT Non‐Hermitian physics enables unconventional wave manipulation through engineered gain and loss. However, realizing controllable dissipation while preserving intrinsic electromagnetic modes remains a significant challenge for implementing non‐Hermitian systems in microwave platforms. Here, we propose an MXene loss engineering strategy for realizing an anti‐parity‐time (APT) symmetric plasmonic skyrmion system based on coupled designer surface plasmonic resonators supporting localized skyrmion field textures. By exploiting the conductivity tunability of Ti 3 C 2 MXene, spatially distributed and continuously adjustable dissipation is achieved while preserving the intrinsic plasmonic skyrmion modes. Together with the intrinsic coupling between the resonators, the distributed loss induces effective dissipative coupling, enabling a purely loss‐engineered realization of APT symmetry without requiring gain media. This dissipative coupling drives a clear APT phase transition at an exceptional point (EP), evidenced by eigenvalue bifurcation and eigenstate phase evolution. Operating near the EP, the system exhibits a characteristic square‐root frequency response to weak dielectric perturbations, resulting in an approximately fourfold enhancement of the frequency response compared with a conventional plasmonic skyrmion system. These results establish a route for implementing non‐Hermitian plasmonic skyrmion systems through distributed loss engineering, opening opportunities for compact and tunable devices in electromagnetic sensing and advanced electromagnetic wave manipulation.