Tunable Photonic Band Gaps in Two-Dimensional Bravais–Moiré Photonic Crystal Composed of High-Tc Superconductors

Condensed Matter

article

Hernán A. Gómez-Urrea¹  José G. Cardona¹  Miguel E. Mora-Ramos²  Carlos A. Duque³ 

[1] Facultad de Ciencias Básicas, Universidad de Medellín;Centro de Investigación en Ciencias-IICBA, Universidad Autónoma del Estado de Morelos;Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA

关键词: Bravais–Moiré;    high temperature superconductors;    photonic gap mapping;    coupled resonator optical waveguide;    slow-light;    2D photonic crystal;   

DOI  :  10.3390/condmat8020051

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In this study, we perform a theoretical study of light propagation properties in two-dimensional square photonic crystals (PCs) following Bravais–Moiré (BM) patterns composed of copper oxide high-temperature superconductors (HTSCs). The BM PCs are made of cylindrical cores formed from the combination of two square Bravais lattices. The Moiré pattern forms due to a commensurable rotation of one of these lattices with respect to the other. The dielectric function of the superconducting material is modeled by the two-fluid Gorter–Casimir theory. We report on the corresponding gap, the mapping as a function of the radius of dielectric cores, as well as the dispersion relations of TM modes for BM PCs and for the waveguide system built of defect lines within such a crystal. The BM PCs were composed of copper oxide HTSCs, which exhibit large tunability in terms of temperature.

【 授权许可】

CC BY