Cubillos Cornejo Javier, Guzmán-Silva Diego, Cornejo Víctor Hugo, Bordeu Ignacio, Vicencio Rodrigo A
Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile.
Millenium Institute for Research in Optics - MIRO, Santiago, Chile.
Sci Rep. 2023 Aug 11;13(1):13057. doi: 10.1038/s41598-023-39985-8.
The capacity of a physical system to transport and localize energy or information is usually linked to its spatial configuration. This is relevant for integration and transmission of signals as performed, for example, by the dendrites of neuronal cells. Inspired by recent works on the organization of spines on the surface of dendrites and how they promote localization or propagation of electrical impulses in neurons, here we propose a linear photonic lattice configuration to study how the geometric features of a dendrite-inspired lattice allows for the localization or propagation of light on a completely linear structure. We show that by increasing the compression of the photonic analogue of spines and thus, by increasing the coupling strength of the spines with the main chain (the "photonic dendrite"), flat band modes become prevalent in the system, allowing spatial localization in the linear - low energy - regime. Furthermore, we study the inclusion of disorder in the distribution of spines and show that the main features of ordered systems persist due to the robustness of the flat band states. Finally, we discuss if the photonic analog, having evanescent interactions, may provide insight into linear morphological mechanisms at work occurring in some biological systems, where interactions are of electric and biochemical origin.
物理系统传输和定位能量或信息的能力通常与其空间构型相关。这与信号的整合和传输有关，例如由神经元细胞的树突所执行的信号整合和传输。受近期关于树突表面棘突的组织方式以及它们如何促进神经元中电脉冲的定位或传播的研究工作启发，在此我们提出一种线性光子晶格构型，以研究受树突启发的晶格的几何特征如何使光在完全线性的结构上实现定位或传播。我们表明，通过增加棘突的光子类似物的压缩程度，进而增加棘突与主链（“光子树突”）的耦合强度，平带模式在系统中变得普遍，从而在低能量线性区域实现空间定位。此外，我们研究了棘突分布中无序因素的影响，结果表明由于平带态的稳健性，有序系统的主要特征得以保留。最后，我们讨论具有倏逝相互作用的光子类似物是否能为某些生物系统中起作用的线性形态机制提供见解，在这些生物系统中，相互作用源于电和生化过程。
