| dc.description.abstract | This paper investigates circular dichroism (CD) using metasurfaces composed of intrinsic chiral structures,we found that metasurfaces composed of nano-fin arrays exhibit giant magneto-optical resonance (GMR) characteristics. GMR is known for its diffraction and resonant properties within the waveguide structure at specific wavelengths. In this study, we explore various aspects by manipulating the polarization source, period, rotation angle, thickness, and incident angle of the nano-fin arrays. We discovered that under specific periods and thicknesses of vertically incident nano-fin arrays, the wavelength peak values of left and right circularly polarized light differ, resulting in circular dichroism (CD).
To enable operation in the visible light range, Nb2O5 was chosen as the structural material, and SiO2 was used as the substrate due to its favorable refractive index and low absorption in the visible light range. When light is incident on the structure and substrate, it helps in the generation of GMR characteristics.
This intrinsic chiral structure can be applied in the visible light wavelength range. Under normal incidence, it exhibits a CD value of 0.95. When the incident angle ranges from 0 to 5 degrees, the CD value varies from approximately 0.95 to 0.77. This indicates that even considering measurement errors in incident light, the CD value can still be maintained at a satisfactory level. | en_US |