Meta-surface Structure for Polarization Control Based on Malus Law

Abstract

Metamaterials and metsurfaces structures in subwavelength scale which is integrated on the different building blocks of optical structures reshapes the design of photonic circuits. These circuits leads to electromagnetic waves control. Huge growth of metasurface nano-fabricated structures helps in numerous optical applications. One of these applications is optical polarizers. Optical polarization has great impact on diffraction, refraction in addition to flat optics and different optical industries in our daily life. Controlling light intensity and phase helps in many applications in different fields. In this article simple 300*300 nm nano Malus-metasurface structure is presented and simulated to show a (45°) phase shift. Detailed Study for transmission and reflection coefficients are introduced for the nano-gold metastructure. Another study for phase dependence of wavelength is presented. This structure enables controlling light phase and intensity according to Malus law. The structure can provide different patterns as grey near field pattern and holographic far field pattern. This implies connection between Pancharatnam-Berry phase shift and continual intensity modification. This design allows to merge between nanooptics, phase manipulation and the classical malus-law. The presented structure is more compatible with many applications due to its dependence on gold rather than any used material. The proposed polarizer can be used in many applications specially in encryption, multiplexing, dual channel display virtual reality, communication, programming, optical fields, biomedical sensing, artificial intelligence and different applications..