Method for realizing high-download rate photonic crystal demultiplexer with reflection micro-cavity employing implantation technology

Abstract

The invention relates to a method for realizing a high-download rate photonic crystal demultiplexer with a reflection micro-cavity employing an implantation technology. In the method, a device structure for introducing the reflection micro-cavity and a microfluid implantation technology into a two-dimensional photonic crystal demultiplexer is designed, and a higher download rate is acquired by increasing the reflection micro-cavity at a specific position on the rear side of a download micro-cavity along a main waveguide direction; and microfluid with different refractive indexes is implanted into an air hole of a resonant cavity at different positions of the demultiplexer, so that a guide die of a photonic crystal is changed, a transmission peak shifts, and multi-channel wavelength demultiplexing is realized. The photonic crystal having a medium background air hole structure in a triangular lattice is utilized, and the method is closer to a silicon-on-insulator (SOI)-based photonic crystal manufacturing technology which is widely applied at present, and is high in realizability. The three channels have the transmissivity of over 95 percent, and good application of the method in photon integration and wavelength division multiplexing (WDM) can be acquired.

Description

Technical field [0001] The invention relates to a method for realizing a high download rate photonic crystal demultiplexer using injection technology and a reflective microcavity, and belongs to the technical field of optical communication. Background technique [0002] With the large-scale application of wavelength division multiplexing (WDM) technology in communication systems, many demultiplexers of different structures have been proposed and extensively studied. So far, demultiplexers mainly include semiconductor demultiplexers (Document 1, Koichi Takiguchi, Tsutomu Kitoh, Manabu Oguma, Atsushi Mori, and Hiroshi Takahashi, "Integrated-optic demultiplexers for optical OFDM signals," Optical Fiber Communication Conference (OFC) 2011, and Literature 2, Jianjun Chen, Zhi Li, Jia Li, and Qihuang Gong, "Compact and high-resolution plasmonic wavelength demultiplexers based on Fano interference," Optics Express, Vol.19 Issue 10, pp.9976- 9985 (2011)), metal grating demultiplexer (Do...

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Problems solved by technology

[0006] The purpose of the present invention is to solve two important problems in the manufacturing process of the wave demultiplexer: one is that the download efficiency of the demultiplexer is not high, and traditional solutions such as blocking the output port of the main waveguide will cause signal interference and affect the demultiplexer. The scalability of the multiplexer cannot be applied to optical integrated circuits; the second is that the production accuracy of photonic crystal air hole structure resonators is high, and the current technology cannot meet the requirements.

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