Colors display with spatial light modulator based on sub-wavelength metal grating

Bo Tao; GuiZhu Wang; Sui Wei; Chuan Shen; ZhangMing Xu

doi:10.1117/12.2580475

5 November 2020 Colors display with spatial light modulator based on sub-wavelength metal grating

Bo Tao, GuiZhu Wang, Sui Wei, Chuan Shen, ZhangMing Xu

Proceedings Volume 11564, AOPC 2020: Optoelectronics and Nanophotonics; and Quantum Information Technology; 115640H (2020) https://doi.org/10.1117/12.2580475
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

A spatial light modulator based on sub-wavelength gold grating structure, named GLCoS by us, has been devised and tested to meet the challenge of the high space-bandwidth product in holographic video display. A sample GLCoS has been made and its display color appears green. However, if it is to be a device of a display system, its color characteristics must be further investigated, that is, its ability to display RGB color and its color purity. There are two MIM (Metal-Insulator-Metal) in the GLCoS, sub-wavelength gold grating plus liquid crystal cell and aluminum electrode forms a hybridized MIM and sub-wavelength gold grating itself is a MIM acting as an open-end TM-FP (TM-Fabry-Pérot) resonator. Based on our previous study involving GLCoS theoretical model, simulation software platform (FDTD plus CST Studio Suite) and an experimentally verified sample of single color, we seek an engineering way with simplicity and compatibility in the sense of the technique to investigate the red-green-blue (RGB) color display with GLCoS. Among the huge parameter space including the geometry and size of the structure, material, wavelength and light incident angle. We choose to change width of the slit, incident angle, LC (liquid crystal) birefringence to find the appropriate GLCoS spectral characteristics. The simulation results show that the dynamic modulation of the RGB phase can be achieved in the visible light band, and its amount of phase modulation is close to 2π and high chromatographic purity.

Citation Download Citation

Bo Tao, GuiZhu Wang, Sui Wei, Chuan Shen, and ZhangMing Xu "Colors display with spatial light modulator based on sub-wavelength metal grating", Proc. SPIE 11564, AOPC 2020: Optoelectronics and Nanophotonics; and Quantum Information Technology, 115640H (5 November 2020); https://doi.org/10.1117/12.2580475

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KEYWORDS

RGB color model

Dielectrics

Metals

Gold

Refractive index

Aluminum

Electrodes

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