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arXiv 2404.04151physics.optics
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在异常点处对任意波前实现相干完美吸收

Coherent Perfect Absorption of Arbitrary Wavefronts at an Exceptional Point

Helmut Hörner, Lena Wild, Yevgeny Slobodkin, Gil Weinberg, Ori Katz, Stefan Rotter

AI总结:

本文提出将异常点物理与简并腔结合,设计出大规模简并异常点吸收器,实现对任意波前的宽带相干完美吸收,并给出两种实现方案及解析与数值模拟对比。

摘要:

相干完美吸收器(Coherent Perfect Absorber, CPA)利用光的干涉特性,将光场的全部入射能量沉积到一个原本弱吸收的样品中。该概念的缺点在于,CPA 中所需的相消干涉很容易因入射光场的光谱失谐或空间失谐而被破坏。最近,这两个限制分别通过异常点物理的见解和使用简并腔得到了克服。在此,我们展示了如何将这两个概念结合成一种新型腔体设计,从而实现对任意波前的宽带异常点吸收。我们提出了这种大规模简并异常点吸收器的两种可能实现方案,并将解析结果与数值模拟进行了比较。

英文摘要:

A Coherent Perfect Absorber (CPA) exploits the interferometric nature of light to deposit all of a light field's incident energy into an otherwise weakly absorbing sample. The downside of this concept is that the necessary destructive interference in CPAs gets easily destroyed both by spectrally or spatially detuning the incoming light field. Each of these two limitations has recently been overcome by insights from exceptional-point physics and by using a degenerate cavity, respectively. Here, we show how these two concepts can be combined into a new type of cavity design, which allows broadband exceptional-point absorption of arbitrary wavefronts. We present two possible implementations of such a Massively Degenerate Exceptional-Point absorber and compare analytical results with numerical simulations.

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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