2012/01/25 by Jacob Trevino, Seng Fatt Liew, Heeso Noh +2 · 62 citations
Physics and Astronomy · Materials Science · #Photonic Crystals and Applications #Liquid Crystal Research Advancements #Quasicrystal Structures and Properties #Isotropy #Multifractal system #Optics #Physics #Photonics #Density of states #Condensed matter physics #Materials science #Fractal
paper · doi:10.1364/oe.20.003015
published in Optics Express 20(3), 3015 (Optica Publishing Group)
openalex publication_date 2012/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
We present a numerical study of the structural properties, photonic density of states and bandedge modes of Vogel spiral arrays of dielectric cylinders in air. Specifically, we systematically investigate different types of Vogel spirals obtained by the modulation of the divergence angle parameter above and below the golden angle value (≈137.507°). We found that these arrays exhibit large fluctuations in the distribution of neighboring particles characterized by multifractal singularity spectra and pair correlation functions that can be tuned between amorphous and random structures. We also show that the rich structural complexity of Vogel spirals results in a multifractal photonic mode density and isotropic bandedge modes with distinctive spatial localization character. Vogel spiral structures offer the opportunity to create novel photonic devices that leverage radially localized and isotropic bandedge modes to enhance light-matter coupling, such as optical sensors, light sources, concentrators, and broadband optical couplers.