Optimal design of sub-wavelength metal rectangular gratings for polarizing beam splitter based on effective medium theory

Abstract

A novel optimal design of sub-wavelength metal rectangular gratings for the polarizing beam splitter (PBS) is proposed. The method is based on effective medium theory and the method of designing single layer antireflection coating. The polarization performance of PBS is discussed by rigorous couple-wave analysis (RCWA) method at a wavelength of 1550 nm. The result shows that sub-wavelength metal rectangular grating is characterized by a high reflectivity, like metal films for TE polarization, and high transmissivity, like dielectric films for TM polarization. The optimal design accords well with the results simulated by RCWA method.

Electroactive subwavelength gratings (ESWGs) from conjugated polymers for color and intensity modulation

“…Thus there are many applications of SWGs: structural color generation, 5 anti-reflectors, 6,7 polarizers, 8 beam splitters, [9][10][11] color filters, 12 electronics, 13 and waveguides. 14,15 However, most of the previous reports are based on passive SWGs, using either high or low refractive index materials depending on the specific applications, where the optical functions of SWGs were achieved but there was no external control over their functionality.…”