Thermally Switchable Metasurface for Controlling Transmission in the THz-gap

Thermal controlled multi-functional metasurface for freely switching of absorption, reflection, and transmission

“…In recent years, a number of multi-functional metasurfaces (MFM) based on these three types have been proposed in both terahertz (THz) and microwave bands, which have different functions for different incident waves. [21][22][23][24][25][26][27] For example, by controlling the phase of Ge 2 Sb 2 Te 5 (GST) in the near-infrared (NIR) region, Zhang et al 28 proposed a multifunctional absorber capable of controlling the polarization and hence the selective absorption, and Nikhil et al 29 incorporated vanadium dioxide (VO 2 ) into the metasurface, which was able to achieve a dual-band transmission response in the THz band range. However, these devices are based on the control of established operating modes (absorption, transmission, or reflection), such as phase, frequency, amplitude, etc., and do not realize the switching of operating modes, which greatly limits the further applications of the metasurfaces.…”

Real-Time Terahertz Modulation Using Gold-MoS2 Metasurface With Electromagnetically Induced Transparency-Like Resonance

“…The development of metamaterials has emerged as a breakthrough approach with unique electromagnetic properties, including negative refractive index [2], [3] and perfect lensing [4] capabilities, which are unattainable with conventional materials. This study targets metasurface devices with narrowband resonances for advanced THz modulation [5], [6], [7], stressing the significance of achieving electromagnetically induced transparency-like (EIT-like) resonances [8], [9] with higher quality (Q) factors.…”