All-dielectric metamaterials conforming to an optical reflectionless potential (ORP) offer broadband, omni-directional suppression of reflection. Though they are predicted to possess broadband negative group velocity dispersion (GVD), ultrashort pulse propagation through such materials has not been studied so far, to the best of our knowledge. In this work, we demonstrate negative GVD and group delay dispersion over broadband covering visible to near-infrared wavelengths. We investigate the role of ORP in supercontinuum generation (SC), which is observed to be polarization independent. The negative GVD in ORPs is interesting for pulse compression, phase compensation, dispersion engineering, and controlled SC generation.

中文翻译：

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全介质超材料中的宽带负基团速度色散及其在超连续谱产生中的作用

符合无反射光学势能（ORP）的全电介质超材料可提供宽带全向反射抑制。尽管据预测它们具有宽带负基团速度色散（GVD），但据我们所知，迄今为止尚未研究通过此类材料的超短脉冲传播。在这项工作中，我们证明了在可见光到近红外波长范围内，宽带上的负GVD和群时延色散。我们研究了ORP在超连续谱产生（SC）中的作用，该现象被认为与极化无关。ORP中的负GVD对于脉冲压缩，相位补偿，色散工程和可控SC生成非常有趣。