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arXiv 2103.09182physics.optics
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非均匀介质中局域折射率剪裁的光限制

Light confinement by local index tailoring in inhomogeneous dielectrics

I. Krešić, K. G. Makris, S. Rotter

摘要:

光限域工程是光学中一个历史悠久的课题,对于控制光与物质的相互作用具有重要意义。然而,在非均匀和无序介质中,多重散射阻止了传统方法用于设计具有所需特性的光场的应用。这是因为对这种介质的任何局部改变通常以非局部和复杂的方式影响这些场。在这里,我们提出了一种用于定制非均匀一维(1D)厄米介电指数分布的理论方法,使得可以纯粹局部地控制入射光场的强度分布,即,而对指定的感兴趣区域之外的场分布几乎没有影响或没有影响。因此,在介质内的任意位置处强烈地增加或减少光的强度成为可能,而实际上不改变介质的外部反射率或透射率。因此,可以使介质的这些局部修改对于单向远场测量是不可检测的。我们应用我们的方法来局部控制光的限制内的一维材料具有不均匀的连续折射率分布,并将其扩展到多层膜以及耦合微谐振器链。

英文摘要:

The engineering of light confinement is a topic with a long history in optics and with significant implications for the control of light-matter interaction. In inhomogeneous and disordered media, however, multiple scattering prevents the application of conventional approaches for the design of light fields with desired properties. This is because any local change to such a medium typically affects these fields in a non-local and complicated fashion. Here, we present a theoretical methodology for tailoring an inhomogeneous one-dimensional (1D) Hermitian dielectric index distribution, such that the intensity profile of an incoming light field can be controlled purely locally, i.e., with little or no influence on the field profile outside of a designated region of interest. Strongly increasing or decreasing the light's intensity at arbitrary positions inside the medium thereby becomes possible without, in fact, changing the external reflectance or transmittance of the medium. These local modifications of the medium can thus be made undetectable to unidirectional far field measurements. We apply our approach to locally control the confinement of light inside 1D materials with inhomogeneous continuous refractive index profiles and extend it to multilayer films as well as to chains of coupled micro-resonators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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