Dual-band asymmetric transmission of chiral metamaterial based on complementary U-shaped structure

Tunable dual-band asymmetric transmission for circularly polarized waves with graphene planar chiral metasurfaces

“…Controlling this plasmon excitation of metasurfaces actively will enable dynamic tunability of the asymmetric transmission and potentially expand the range of asymmetric transmission applications even further. However, the tunability of the plasmon excitation in metasurfaces has to be controlled by accurately fabricating different nanostructures in the previous works, which is an inherent drawback [14,16,17]. Moreover, the proposed asymmetric transmission devices always have complex structures which prevent its real applications in modern optical systems.…”

Multi-Band Asymmetric Transmission and 90° Polarization Rotator Based on Bi-Layered Metasurface with F-Shaped Structure

“…The phenomenon of asymmetric transmission was first discussed for the circularly polarized waves in the chiral metamaterial with planar structure [14]. With the deep research of asymmetric transmission, many structures have been proposed to achieve different functions such as highly dual band and broadband [15][16][17][18]. Based on these structures, it is found that lack of symmetry plays an indispensable role in asymmetric transmission [9][10][11][12][13][14][15][16][17][18][19][20].…”

“…With the deep research of asymmetric transmission, many structures have been proposed to achieve different functions such as highly dual band and broadband [15][16][17][18]. Based on these structures, it is found that lack of symmetry plays an indispensable role in asymmetric transmission [9][10][11][12][13][14][15][16][17][18][19][20]. Recently, Menzel et al [21,22] proposed that a structure with a broken symmetry can realize dual-band asymmetric transmission of linearly and circularly polarized waves in optical regions, respectively, but the deficiency is that the asymmetric transmission for both polarized waves does not reach 0.6.…”

A Wide-Angle and Wide-Band Circular Polarizer Using a Bi-Layer Metasurface

“…Based on various chiral MMs, most transmissive polarizers, which can realize linear [15][16][17][18][19][20][21][22][23] or circular [24][25][26][27][28][29][30][31][32][33][34][35] polarization conversion, have been proposed. In addition, because of the asymmetry of these chiral MM structures, in most cases, the asymmetric transmission effect, which means that the transmission coefficients are different at the incidences with different polarizations (x/y-or RHCP/LHCP-polarizations), can also be observed at the same time [17][18][19][20][21][22][23][25][26][27][28][29][30][31][32][33][34][35]. The asymmetric transmission effect can be used for polarization selection; however, it should be avoided sometimes to ensure that the transmission coefficients are the same at the incidences with different polarizations.…”