本文设计了一种利用光子晶体缺陷态消失的光子晶体调制器,它的工作波长为1550 nm,该调制器采用了介质柱型的三角晶格光子晶体。在三角晶格光子晶体的基础上,采用点缺陷与线缺陷直接耦合的结构,通过在点缺陷中引入非线性材料砷化镓(GaAs)作为可调谐物质,设计了基于圆形点缺陷谐振腔的光控高速光子晶体调制器。该调制器消光比高达49.7 dB,插入损耗低至0.352 dB,调制速率为高达296 Gbit/s。 A high speed modulator based on photonic crystals using the feature of the disappearing of the defect mode is presented in the paper. The optical wave is in 1550 nm. The modulator using a photonic crystal of triangular lattice with dielectric cylinder. On basis of the triangular lattice photonic crystal, the modulator uses the structure of direct coupling of point defects and line defects. The high-speed photonic crystal modulator based on a round point defect resonator is designed by introducing optical controlled GaAs as a tunanble material. It has an extinction ratio of 49.7 dB, insertion loss as low as 0.352 dB, modulation rate up to 296 Gbit/s.
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