Light trapping at Dirac point in 2D triangular archimedean-like lattice photonic crystal

Qiuping Mao, Kang Xie*, Lei Hu, Qian Li, Wei Zhang, Haiming Jiang, Zhijia Hu, Erlei Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Optical cavities and waveguides are critical parts of modern optical devices. Traditionally, optical cavities and waveguides rely on photonic bandgaps, or total internal reflection, to achieve light trapping. It has been reported that a novel light trapping, which exists in triangular and honeycomb lattices, is attributed to the so-called Dirac point. Our analysis reveals that 2D triangular Archimedean-like lattice photonic crystals also can support this Dirac mode with similar characteristics. This is a new type of localized mode with a different algebraic field profile at a different specified Dirac frequency, which is also beyond any complete photonic bandgap. The new wave localization has different features and can be applied to the design of new optical devices.

Original languageEnglish
Pages (from-to)B139-B143
JournalApplied Optics
Volume55
Issue number12
DOIs
Publication statusPublished - 20 Apr 2016

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