纳米工程液体镜的光学测试
Optical Tests of Nanoengineered Liquid Mirrors
摘要：
我们描述了一种制造廉价高质量反射镜的新技术。我们首先通过化学方法生产大量涂有有机配体的金属纳米颗粒。然后将颗粒散布在液体基底上，在那里它们自组装以提供光学质量的反射表面。由于液体表面可以用各种手段（例如旋转、电磁场）进行改性，因此这开启了制造新型通用且廉价的光学元件的可能性，所述光学元件可以具有可以在短时间尺度内进行改性的复杂形状。干涉测量显示光学质量表面。我们已经获得了峰值反射率为80%的反射率曲线，我们相信我们可以改进反射率曲线，因为理论模型预测的值更高。我们期望纳米工程液体镜应该是有用的科学和工程应用。该技术对于大型光学器件，例如大型旋转抛物柱面镜，由于其低成本而令人感兴趣。此外，因为铁磁流体的表面可以用磁场成形，所以可以产生用常规技术难以制造的复杂的时变表面。
英文摘要：
We describe a new technology for the fabrication of inexpensive high-quality mirrors. We begin by chemically producing a large number of metallic nanoparticles coated with organic ligands. The particles are then spread on a liquid substrate where they self-assemble to give optical quality reflective surfaces. Since liquid surfaces can be modified with a variety of means (e.g. rotation, electromagnetic fields), this opens the possibility of making a new class of versatile and inexpensive optical elements that can have complex shapes which can be modified within short time scales. Interferometric measurements show optical quality surfaces. We have obtained reflectivity curves that show 80% peak reflectivities.We are confident that we can improve the reflectivity curves, for theoretical models predict higher values. We expect that nanoengineered liquid mirrors should be useful for scientific and engineering applications. The technology is interesting for large optics, such as large rotating parabolic mirrors, because of its low cost. Furthermore, because the surfaces of ferrofluids can be shaped with magnetic fields, one can generate complex, time varying surfaces difficult to make with conventional techniques.
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