Switchable metasurface for nearly perfect reflection, transmission, and absorption using PIN diodes

Abstract

Active metasurfaces with dynamically switchable functionalities are highly in demands in various practical applications. In this paper, we experimentally present an active metasurface based on PIN diodes which can realize nearly perfect reflection, transmission and absorption in a single design. Such switchable functionalities are accomplished by controlling the PIN diodes integrated in both layers of the metasurface. A transmission line model is employed to further investigate the underlying mechanism of the metasurface. This proposal is confirmed by numerical simulations and experiments. As a novel metasurface with multiple switchable functionalities, our design may find some practical applications such as smart radomes.

Split Ring Resonator Network and Diffused Sensing Element Embedded in a Concrete Beam for Structural Health Monitoring

“…Although the present study was limited to a frequency range compatible with portable low-cost instrumentation, a very interesting future development could regard the adoption of miniaturized THz-band sensing structures, thus allowing for a finer distributed sensor network as well as a more efficient detection on micro-cracks occurring during the lifespan of the concrete structure. Such THz structures have been recently proposed in the literature [34][35][36][37][38].…”

Reconfigurable Metasurface for Nearly Full-Range and Continuous Modulation of Reflection, Transmission, and Absorption

“…Most recently, Li et al presented a switchable metasurface with PIN diodes incorporated that can perform nearly perfect transmission and absorption. Also, many metasurfaces combining reflection and transmission, called full-space metasurfaces, have been proposed. − While active metasurfaces have been extensively studied, little effort has been devoted to the possibility of switching between reflection, transmission, and absorption in a single metasurface. , Such active metasurfaces are limited to the switching between different states, where the reflectance, transmittance, and absorptance could not be dynamically and continuously controlled. The dynamic and large-range modulation of reflection, transmission, and absorption in a single metasurface is still highly demanded, especially for applications like smart radomes.…”

Band‐notched frequency‐selective absorber with linear polarization rotation function

“…However, the structure in Reference 12 does not have the out‐of‐band absorption function, and the design in Reference 13 is polarization‐sensitive. To switch between the three working modes, PIN diodes are utilized 14 . Varactor, on the other hand, can be used to control the reflection band 15 …”

“…To switch between the three working modes, PIN diodes are utilized. 14 Varactor, on the other hand, can be used to control the reflection band. 15 RCS is a critical factor in evaluating stealth performance.…”