Efficient Polarization Beam Splitter Based on All-Dielectric Metasurface in Visible Region

Abstract

In this paper, we present an all-dielectric gradient metasurface, composed of periodic arrangement of differently sized cross-shaped silicon nanoblocks resting on the fused silica substrate, to realize the function of polarization split in visible region. The cross-shaped silicon block arrays can induce two opposite transmission phase gradients along the x-direction for the linear x-polarization and y-polarization. By properly designing, the metasurface can separate the linearly polarized light into x- and y-polarized ones, which propagate at the same angle along the left and right sides of the normal incidence in the x-z plane. Particularly, when a beam with the polarization angle of 45.0° is incident on the proposed device, the x- and y-polarized transmitted ones possess nearly equal intensity within the wavelength range from 579 to 584 nm. We expect the proposed polarization beam splitter can play an important role for future free-space optical devices.

All-Dielectric Meta-optics for High-Efficiency Independent Amplitude and Phase Manipulation

“…Specifically, the ability to locally control the transmission characteristics provides a powerful approach to realizing flat optical components and systems with improved performance [1][2][3][4] . This has been shown through a variety of devices, including flat lenses 5,6 , beam-splitters [7][8][9][10][11][12] , holograms [13][14][15][16][17] , augmented reality displays 18 , highdefinition displays 19 , image differentiation 20 , and compact optical spectrometers 21 . However, optical applications requiring spatial manipulation of the amplitude profile have relied on reflection 22 , absorption 23 , or polarization conversion loss 11,12,[14][15][16][17] , resulting in low efficiencies.…”

“…Metasurface beam-splitters have been demonstrated through a variety of methods [7][8][9][10][11][12] , however the beam shape is not altered, and efficiency is reduced due to diffraction or the use of loss. Another use of amplitude and phase control is in forming three-dimensional holograms, which can be produced with high quality if a specific complex-valued field profile is formed 16 .…”

Dual-Bandwidth Linear Polarization Converter Based on Anisotropic Metasurface

“…Recently, artificial metasurface structures have been extensively used to manipulate EM waves, particularly in control polarization [8]- [12]. Metasurface provides an encouraging method for polarization control because it can make the EM amplitude and phase of scattered light change abruptly within the sub-wavelength space region [13]- [18].…”

Terahertz smart dynamic and active functional electromagnetic metasurfaces and their applications

“…It demonstrates the metasurface effectively split the normal and incident x-and y-polarized components at 0.32-0.42 THz in different planes. There are also various reports on functions including the metasurface lens [16,[18][19][20][21][22][23][24][25][26], vortex beam generators [27][28][29][30][31][32][33][34][35][36] and polarization beam splitters [37][38][39][40][41][42][43]. The phase of metallic structures on the gradient metasurface maintains a certain special relationship, which provides powerful electromagnetic wave manipulation capabilities.…”