Electrically Tunable Multicolored Filter Using Birefringent Plasmonic Resonators and Liquid Crystals,ACS Photonics

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Electrically Tunable Multicolored Filter Using Birefringent Plasmonic Resonators and Liquid Crystals
ACS Photonics ( IF 6.5 ) Pub Date : 2020-01-10 , DOI: 10.1021/acsphotonics.9b01404
Luc Driencourt ₁ , François Federspiel ₂ , Dimitrios Kazazis ₃ , Li-Ting Tseng ₃ , Richard Frantz ₂ , Yasin Ekinci ₃ , Rolando Ferrini ₁ , Benjamin Gallinet ₁

Affiliation

Dynamic tuning of color filters finds numerous applications including displays or image sensors. Plasmonic resonators are subwavelength nanostructures which can tailor the phase, polarization, and amplitude of the optical field, but they are limited in color vibrancy when used as filters. In this work, birefringence-induced colors of plasmonic resonators and a fast switching thin liquid crystal cell are combined in a multicolored electrically tunable filter. With this mechanism, the color gamut of the plasmonic surface and the liquid crystal cell is mutually enhanced in order to generate all primary additive and subtractive colors with high saturation as well as different tones of white. A single filter is able to cover more than 70% of the color gamut of standard RGB filters by applying a voltage ranging between 2 and 6.5 V. This spectral selectivity is added in transmission without any loss in the image resolution. The presented approach is foreseen to be implemented in a variety of devices including miniature sensors or smart-phone cameras to enhance the color information, ultraflat multispectral imagers, wearable or head-worn displays, as well as high resolution display panels.

中文翻译：

使用双折射等离子体谐振器和液晶的可电调谐彩色滤光片

动态调整彩色滤光片可用于众多应用，包括显示器或图像传感器。等离子体共振器是可以调节光场的相位，偏振和幅度的亚波长纳米结构，但是当用作滤光片时，它们的颜色振动度受到限制。在这项工作中，等离激元谐振器和快速切换的薄液晶单元的双折射引起的颜色被组合在一个彩色电可调滤光器中。利用这种机制，相互增强了等离子体表面和液晶单元的色域，以便生成所有具有高饱和度以及不同色调的白色的主加色和减色。通过施加2至6.5 V之间的电压，单个滤镜能够覆盖标准RGB滤镜的70％以上的色域。在传输中增加了这种光谱选择性，而不会降低图像分辨率。预计所提出的方法将在各种设备中实现，包括微型传感器或智能手机相机以增强色彩信息，超平坦多光谱成像仪，可穿戴式或头戴式显示器以及高分辨率显示面板。

更新日期：2020-01-10

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