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Investigation of beam splitter in a zero-refractive-index photonic crystal at the frequency of Dirac-like point.


ABSTRACT: The Dirac-like cone dispersion of the photonic crystal induced by the three-fold accidental degeneracy at the Brillouin center is calculated in this paper. Such photonic crystals can be mapped to zero-refractive-index materials at the vicinity of the Dirac-like point frequency, and utilized to construct beam splitter of high transmission efficiency. The splitting ratio is studied as a function of the position of the input/output waveguides. Furthermore, variant beam splitters with asymmetric structures, bulk defects, and some certain bending angles are numerically simulated. Finally, we show that 1 × 2 to 1 × N beam splitting can be realized with high transmission efficiency in such a zero-refractive-index photonic crystal at the frequency of Dirac-like point. The proposed structure could be a fundamental component of the high density photonic integrated circuit technique.

SUBMITTER: Qiu P 

PROVIDER: S-EPMC5574982 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Investigation of beam splitter in a zero-refractive-index photonic crystal at the frequency of Dirac-like point.

Qiu Pingping P   Qiu Weibin W   Lin Zhili Z   Chen Houbo H   Ren Junbo J   Wang Jia-Xian JX   Kan Qiang Q   Pan Jiao-Qing JQ  

Scientific reports 20170829 1


The Dirac-like cone dispersion of the photonic crystal induced by the three-fold accidental degeneracy at the Brillouin center is calculated in this paper. Such photonic crystals can be mapped to zero-refractive-index materials at the vicinity of the Dirac-like point frequency, and utilized to construct beam splitter of high transmission efficiency. The splitting ratio is studied as a function of the position of the input/output waveguides. Furthermore, variant beam splitters with asymmetric str  ...[more]

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