Two-dimensional photonic crystal tunable light power divider and working method

Abstract

The invention relates to a two-dimensional photonic crystal tunable light power divider and a working method. A two-dimensional rectangular array structural silicon photonic crystal is filled with nematic liquid crystals; each of line defect waveguides is formed by removing a row of silicon pillars from an intact rectangular lattice photonic crystal; the semi-diameter of one silicon pillar in the photonic crystal is changed so as to introduce a point defect; after incidence of incident light from a first line defect waveguide, part of incident light is coupled into a second line defect waveguide by the point defect; and light power detectors serving as light receiving units are positioned at the ports of two line defect waveguide channels. The whole light power divider is very simple in structure, small and exquisite in volume and stable and reliable in performance; voltage control reaction speed is high and the adjustment of light power can be controlled in a very short time; and the ratio of light power at two output ends can be adjusted just by changing the voltage of conductive templates at two ends of the photonic crystal, so that a tunable functional of the light power is realized.

Description

technical field [0001] The invention relates to an optical power distribution device, in particular to a two-dimensional photonic crystal tunable optical power splitter based on liquid crystal filling. Background technique [0002] Photonic crystal is a new concept material proposed by E.Yablonovich and S.John et al. in 1987. Photonic crystals are ordered structures with periodic arrangements of different dielectric constants (or refractive indices). Its most fundamental feature is that there is a photon band gap, and photons with a frequency within the band gap will not be able to propagate, just like electrons are bound in the semiconductor band gap. Because of this special property, photonic crystals have gained widespread attention in the academic circles, and the research on this material is also being deepened continuously. [0003] Optical power splitters are widely used and researched in the field of communication. The gradual popularization and application of opt...

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Problems solved by technology

[0005] The present invention aims at the problem that the current optical power splitter can only provide a fixed splitting ratio, and proposes a two-dimensional photonic crystal tunable optical power splitter and its working method. The distribution of output light power can be controlled

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