Method utilizing metal grating to achieve wideband adjustable silicon waveguide optical non-linear four wave mixing enhancement

Abstract

The invention discloses a method utilizing metal gratings to achieve wideband adjustable silicon waveguide optical non-linear four wave fixing enhancement. A silicon waveguide is arranged on a metal underlay, which is characterized in that metal gratings are periodically arranged on the silicon waveguide. According to the invention, the enhancing wideband and enhancing factors of the silicon waveguide optical non-linear four wave mixing are determined by the silicon waveguide and the geometric parameters and the grating period of the metal gratings. The invention has the advantages of simply structure and easiness in implement; via properly selecting parameters, a wideband adjustable silicon waveguide optical non-linear four wave fixing enhancement effect is obtained, thus the reliability of the development of the non-linear optical elements is guaranteed, e.g. an optical switch, a logical gate, a memory, an adjustable non-linear waveguide and the like, which are recently disclosed in an all optical communication network.

Description

technical field [0001] The invention relates to a broadband tunable silicon waveguide optical nonlinear four-wave mixing enhancement method, in particular to a method of using metal gratings to excite surface plasmons in the bandwidth range to realize dynamically tunable silicon waveguide optical nonlinear four-wave mixing enhancement The method is suitable for optical fiber communication systems and networks. Background technique [0002] In order to meet the needs of the development of today's information and communication technology, photonics and integrated optics, all-optical micro-nano-structured photonic integrated components with new physical effects are the frontier and hot spot of current research in the field of optics. Therefore, the new small-sized and easy-to-integrate surface plasmons have also become the focus of attention and research by scholars at home and abroad. In the surface plasmon structure, the incident photoelectric magnetic field is coupled with ...

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Problems solved by technology

[0003] At present, optical nonlinear effect enhancement technology has a good theoretical and experimental basis after continuous development and improvement, and people have begun to study nonlinear photonic devices such as optical switches, logic gates, memories, and optical solitons based on nonlinear effects. conducted preliminary application research; however, there are still many deficiencies in the research on the enhancement of optical nonlinear effects, such as: 1) Scholars at Stanford University have made great progress in the enhancement of optical nonlinear effects, but due to this The manipulation of light is based on ultra-cold media, which is still far away from practical applications. 2) Although researchers from research institutes such as the United States, Germany, Canada, and France have made considerable breakthroughs in the enhancement of nonlinear effects, but They only achieve nonlinearity at a specific wavelength or narrow frequency band, which is still a certain distance from the high-bandwidth applications required in the future; 3) People are interested in second-order nonlinear processes on various surfaces and interfaces, such as quadratic The generation of harmonics and sum frequencies has been extensively studied, while third-order nonlinear processes such as four-wave mixing have not been studied in depth

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