A Quasi‐Isolated Dual‐Function Reconfigurable Meta‐Device Based on Dual‐Modes for Remote Monitoring

ABSTRACT Spoof localized surface plasmon resonance (SLSPR) sensors have gained significant attention in various fields, due to their high sensitivity and fast response. Nevertheless, conventional SLSPR sensors are limited for remote monitoring due to the inability to perform radiation independently. Antenna sensors with radiation capability were proposed to address this issue. However, conventional antenna sensors consume a significant amount of sample due to their limited sensitivity, leading to a reduction in radiation efficiency and a shift in bandwidth, thereby posing a risk of communication failure. In addition, traditional antenna sensors lack reconfigurability. Hence, we propose a meta‐device that integrates SLSPR sensors with a reconfigurable antenna, exhibiting dual‐band radiation and dual‐modes: SLSPR and radiation resonance (RR). In SLSPR mode, the meta‐device's sensitivity is seventeen times higher than in RR mode. This enhanced sensitivity facilitates detection even with trace amounts of solution, while simultaneously mitigating decline in gain and minimizing bandwidth shift for communication purposes in RR mode. This dual‐modes allow for the quasi‐isolation of the meta‐device's sensing and radiating capabilities. The meta‐device integrating liquid metal and MEMS technology enables dynamic reconfiguration to switch between Wi‐Fi and Bluetooth frequencies. This significantly expands the potential applications of the meta‐device, particularly in the IoT.