Multifunctional active terahertz metasurface with electromagnetically induced transparency, perfect absorption, and circular dichroism

Wideband and wide-angle reflective metasurface for efficient linear and circular polarization conversion in X, Ku, and K bands

“…Polarization manipulation is paramount in applications such as remote sensing, imaging, antenna design, radar stealth technology, radar technology, and microwave communication. In recent years, two-dimensional metamaterials, specifically metasurfaces, have emerged as promising solutions for manipulating electromagnetic waves [3][4][5][6]. Polarization conversion can be achieved through birefringence in naturally occurring crystals [7].…”

“…The above equation(6) represents the reflection coefficients of the right-and left-hand circularly polarized waves. The reflected circularly polarized plane wave must hold the following reflection coefficients,|R yy | = |R , xy | AE ∆ =AE -AE yy xy =  p , 2for the y polarized incident wave, where the phases of R yy and R xy are AE yy and AE xy and phase difference is AE.∆ For the time-harmonic dependence w e , i t if the phase difference is, AE = + p , then the polarization is right-handed circular polarization; and if it is AE = -p then it is lefthanded circular polarization.…”

Design and experimental realization of multifunctional anisotropic metasurface for efficient polarization manipulation in microwave frequencies

“…Recently, researchers have turned to metasurfaces to more easily modify electromagnetic waves' amplitude, phase, and polarization [2][3][4][5]. Metasurfaces designed for polarization conversion can generally be categorized into two types: transmission-based [6,7] and reflection-based metasurfaces [8][9][10]. An anisotropic metasurface is a specialized type of metasurface that displays varying properties or behaviors depending on the direction.…”