Holographic image generation with a thin-film resonance caused by chalcogenide phase-change material.
Holographic image generation with a thin-film resonance caused by chalcogenide phase-change material.
复制标题
全息图像产生具有薄膜共振是由葡萄干剂相变材料引起的。
DOI：
10.1038/srep41152
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发表时间：
2017-01-24
影响因子：
4.6
通讯作者：
Hwang CS
中科院分区：
文献类型：
--
作者：
Lee SY;Kim YH;Cho SM;Kim GH;Kim TY;Ryu H;Kim HN;Kang HB;Hwang CY;Hwang CS
通过重建物体的振幅和相位信息来观看三维图像，预计数字全息术的发展。与激光干涉写入的模拟全息图相比，数字全息图技术具有利用空间光调制器实现移动3D图像的潜力。然而，为了确保具有大视角的高分辨率3D图像，全息图面板需要具有足够多像素的近波长尺度像素间距。在本文中，我们展示了一种基于硫系相变材料（PCM）的数字全息面板，其像素间距为1 μm，面板尺寸为1.6 × 1.6 cm2。采用准分子激光光刻技术，可将介电层封装的PCM薄膜用于全息图面板。由于介质引起的薄膜共振会影响全息图面板的吸收光谱和衍射光谱，因此通过调节上下介质层的厚度，证明了一种选择性颜色的衍射面板。我们还发现，由超薄PCM层制成的小有源区域（1 μm × 4 μm）的反射颜色可以通过电改变。
The development of digital holography is anticipated for the viewing of 3D images by reconstructing both the amplitude and phase information of the object. Compared to analog holograms written by a laser interference, digital hologram technology has the potential to realize a moving 3D image using a spatial light modulator. However, to ensure a high-resolution 3D image with a large viewing angle, the hologram panel requires a near-wavelength scale pixel pitch with a sufficient large numbers of pixels. In this manuscript, we demonstrate a digital hologram panel based on a chalcogenide phase-change material (PCM) which has a pixel pitch of 1 μm and a panel size of 1.6 × 1.6 cm2. A thin film of PCM encapsulated by dielectric layers can be used for the hologram panel by means of excimer laser lithography. By tuning the thicknesses of upper and lower dielectric layers, a color-selective diffraction panel is demonstrated since a thin film resonance caused by dielectric can affect to the absorption and diffraction spectrum of the proposed hologram panel. We also show reflection color of a small active region (1 μm × 4 μm) made by ultra-thin PCM layer can be electrically changed.