Additive manufacturing systems that can arbitrarily deposit multiple materials into precise, 3D spaces spanning the micro‐ to nanoscale are enabling novel structures with useful thermal, electrical, and optical properties. In this companion paper set, electrohydrodynamic jet (e‐jet) printing is investigated for its ability in depositing multimaterial, multilayer films with microscale spatial resolution and nanoscale thickness control, with a demonstration of this capability in creating 1D photonic crystals (1DPCs) with response near the visible regime. Transfer matrix simulations are used to evaluate different material classes for use in a printed 1DPC, and commercially available photopolymers with varying refractive indices (n = 1.35 to 1.70) are selected based on their relative high index contrast and fast curing times. E‐jet printing is then used to experimentally demonstrate pixelated 1DPCs with individual layer thicknesses between 80 and 200 nm, square pixels smaller than 40 µm across, with surface roughness less than 20 nm. The reflectance characteristics of the printed 1DPCs are measured using spatially selective microspectroscopy and correlated to the transfer matrix simulations. These results are an important step toward enabling cost‐effective, custom‐fabrication of advanced imaging devices or photonic crystal sensing platforms.

中文翻译：

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一维光子晶体的电液动力喷射印刷：第二部分—光学设计和反射特性

可以将多种材料任意沉积到微米级至纳米级的精确3D空间中的增材制造系统，使具有新颖的结构，具有有用的热，电和光学特性。在此伴侣纸中，研究了电动水力喷射（e-jet）印刷技术在具有微米级空间分辨率和纳米级厚度控制的多层材料，多层膜中的沉积能力，并演示了这种具有响应能力的一维光子晶体（1DPC）的创建能力靠近可见政权。转移矩阵模拟可用于评估用于印刷1DPC的不同材料类别以及具有变化的折射率（n= 1.35至1.70）是根据其相对较高的折射率对比和快速固化时间选择的。然后，将E-jet打印技术用于实验性地展示像素化的1DPC，其单层厚度在80到200 nm之间，方形像素的宽度小于40 µm，表面粗糙度小于20 nm。使用空间选择性显微光谱仪测量印刷的1DPC的反射率特性，并将其与传输矩阵模拟相关联。这些结果是朝着实现成本效益，定制制造高级成像设备或光子晶体传感平台迈出的重要一步。