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Optical coatings and metamaterials

机译：光学涂料和超材料

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摘要

An optical surface rarely presents the idea optical behavior desired for the system in which it is employed. Modifying these properties is the task of an optical coating and virtually all optical surfaces in all optical systems carry such treatments. Most often the coating consists of a number of thin layers exhibiting interference effects that yield a suitable performance. Coating performance is constrained by the normal properties of interference. Such behavior could benefit considerably from the use of metamaterials and particularly those exhibiting a negative index of refraction. Unfortunately such true negative index still appears elusive. Negative refraction has been convincingly demonstrated particularly for p-polarization and this is certainly useful in a number of applications but metamaterials have not so far yielded the complete set of properties representing the true negative index that could transform the field of optical coating.
机译：光学表面很少能提供其所采用的系统所需的概念光学行为。修改这些属性是光学涂层的任务，实际上，所有光学系统中的所有光学表面都需要进行此类处理。最常见的是，涂层由许多薄层组成，这些薄层表现出产生适当性能的干涉效应。涂层的性能受到干涉的正常特性的限制。这种行为可以通过使用超常材料，尤其是那些具有负折射率的超常材料而大大受益。不幸的是，这种真正的负面指数仍然难以捉摸。负折射已被令人信服地证明，特别是对于p偏振而言，这肯定在许多应用中有用，但是到目前为止，超材料还没有提供代表可以改变光学涂层领域的真正负折射率的完整性能。

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