期刊
OPTICS EXPRESS
卷 20, 期 3, 页码 3015-3033出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.003015
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- Air Force program Deterministic Aperiodic Structures for On-chip Nanophotonic and Nanoplasmonic Device Applications [FA9550-10-1-0019]
- NSF [ECCS-0846651, DMR-0808937]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0808937] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [846651] Funding Source: National Science Foundation
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 (approximate to 137.507 degrees). 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. (C) 2012 Optical Society of America
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