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首页> 外文会议>Conference on Integrated Optics: Devices, Materials, and Technologies Ⅵ Jan 21-23, 2002 San Jose, USA >Study of the refractive index of nanostructured optical materials
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Study of the refractive index of nanostructured optical materials

机译：纳米结构光学材料的折射率研究

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摘要

Thanks to progresses in photolithography techniques optical materials can now be structured to a scale of a few tens of a nanometer. This has opened a wide field of new applications. When concerned with a scale of some tens of a micron down to a few microns, microlens and integrated optic components can be made. When the material is structured with a scale in the order of the wavelength of light, different filtering functions can be made. This concerns Bragg mirrors or more generally Photonic Crystals. A structuration in a scale small in front of the wavelength is also of a great interest. In this case the material does not diffract the light anymore and it behaves like a homogeneous one. The calculated transmittance of a laser mirror is used to determine the effective index of the single layer equivalent to the multilayer stack. The artificial anisotropy of thin films structured with a one-dimension sub wavelength grating made by holography is measured. The limitation of the first order homogenization theory is given for two different grating steps. Polarizing coatings or polarization rotators are designed to work in normal incidence by inserting anisotropic films in simple multilayer structures.
机译：由于光刻技术的进步，现在可以将光学材料的结构尺寸缩小到几十纳米。这开辟了广泛的新应用领域。当涉及几十微米到几微米的规模时，可以制造微透镜和集成光学元件。当材料以光波长的大小按比例构造时，可以实现不同的过滤功能。这涉及布拉格反射镜或更普遍地涉及光子晶体。在波长前面小的比例尺上的结构也是非常令人感兴趣的。在这种情况下，该材料不再使光发生衍射，并且表现得像均匀的光。所计算的激光镜的透射率用于确定等效于多层堆叠的单层的有效折射率。测量由全息术制造的由一维亚波长光栅构成的薄膜的人工各向异性。给出了针对两个不同光栅步骤的一阶均化理论的局限性。通过将各向异性薄膜插入简单的多层结构中，可将偏振涂层或偏振旋转器设计为以垂直入射的方式工作。

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