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Trapped photons at a Dirac point: a new horizon for photonic crystals
Author(s) -
Xie Kang,
Jiang Haiming,
Boardman Allan D.,
Liu Yong,
Wu Zhenhai,
Xie Ming,
Jiang Ping,
Xu Quan,
Yu Ming,
Davis Lionel E.
Publication year - 2014
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300186
Subject(s) - photonics , photonic crystal , photon , physics , field (mathematics) , optoelectronics , dirac (video compression format) , band gap , optics , quantum mechanics , mathematics , neutrino , pure mathematics
Optical cavities and waveguides are essential building blocks of many modern optical devices. They rely upon photonic bandgaps, or total internal reflections, to achieve field confinement. Here a new phenomenon is reported of wave localization that is attributable to neither of the above light guiding mechanisms. It is found that what is known as the Dirac point within a photonic band structure can play the role of a photonic bandgap with the establishment of field confinement. The new localized mode occurs at a Dirac frequency that is beyond any complete photonic bandgap, and exhibits a unique algebraic profile. The features of this new wave localization will add new capabilities and more flexibility to the design techniques of novel photonic components and photonic chip architectures.