ABSTRACT

During the last decades, researchers of different scientific areas have investigated several systems and materials to suggest new ways of transporting and localizing light. These problems are probably main goals in any search for new configurations and new emerging properties, independently of the degree of complexity of suggested methods. Fortunately, fabrication techniques in photonics have consolidated during the last decades, allowing the experimental implementation of different theoretical ideas which were neither tested nor validated. Specifically, we will focus on recent advances in the implementation of Flat Band (FB) photonic systems. FB periodical structures have at least two bands in their linear spectrum, with one of them completely flat. This implies the emergence of linear photonic states which are completely localized in space and that can be located in different regions across the lattice. This localization occurs as a result of destructive interference, what naturally depends on the particular lattice geometry. In addition, flat band systems also posses dispersive states which make possible the observation of ballistic transport as well. Therefore, FB photonic lattices constitute an unique platform for studying localization and transport, without requiring the inclusion of any sophisticated interaction/effect, rather a smart and simple geometry.

摘要

在过去的几十年中，不同科学领域的研究人员研究了几种系统和材料，以提出运输和定位光的新方法。这些问题可能是寻求新配置和新出现的属性的主要目标，而与建议方法的复杂程度无关。幸运的是，在过去的几十年中，光子学中的制造技术得到了巩固，从而允许实验性地实施未经测试或验证的不同理论思想。具体来说，我们将重点关注扁平带（FB）光子系统实施方面的最新进展。FB期刊结构的线性光谱中至少有两个频带，其中之一完全平坦。这意味着线性光子态的出现，其完全局限在空间中，并且可以位于整个晶格的不同区域。这种定位是由于相消干涉的结果而发生的，而相消干涉自然取决于特定的晶格几何形状。另外，平带系统还具有分散状态，这也使得观察弹道运输成为可能。因此，FB光子晶格构成了一个用于研究定位和运输的独特平台，而无需包括任何复杂的相互作用/效应，而是一种灵巧而简单的几何形状。扁平带系统还具有分散状态，这也使得观察弹道运输成为可能。因此，FB光子晶格构成了一个用于研究定位和运输的独特平台，而无需包括任何复杂的相互作用/效应，而是一种灵巧而简单的几何形状。扁平带系统还具有分散状态，这也使得观察弹道运输成为可能。因此，FB光子晶格构成了一个用于研究定位和运输的独特平台，而无需包括任何复杂的相互作用/效应，而是一种灵巧而简单的几何形状。