Optical nonlinear polarization control element and method for controlling polarization of incident light waves

Abstract

The invention relates to an optical non-linear polarization controlling element. The optical non-linear polarization controlling element comprises an insulating transparent substrate, a metal plasma excimer layer and a refractive index controllable thin film. The metal plasma excimer layer is arranged on one surface of the insulating transparent substrate. The plasma excimer layer comprises multiple chiral micro-structures arranged periodically. The refractive index controllable thin film is arranged on the surface, away from the insulating transparent substrate, of the metal plasma excimer layer and covers the metal plasma excimer layer. The refractive index controllable thin film comprises a material with the refractive index capable of being controlled under illumination. A method for controlling incident light wave polarization includes the step that within certain time, polarized incident light and controlling light are adopted for irradiating the optical non-linear polarization controlling element from one side of the refractive index controllable thin film. Polarized light can be controlled in a full-light mode through the optical non-linear polarization controlling element, and the method has the advantages of being simple and high in response speed.

Description

technical field [0001] The invention relates to the field of polarization optics, in particular to an optical nonlinear polarization regulating element, a method for regulating the polarization of incident light waves, and an application thereof. Background technique [0002] Polarized light has been widely used by people. At present, people have a variety of methods and devices to control the polarization state of light waves, such as electro-optic modulators, liquid crystal modulators, and magneto-optical modulators. Their principle is to use an electric field or a magnetic field to change the birefringence or optical rotation characteristics of electro-optic crystals, liquid crystal molecules, and magneto-optic crystals, thereby changing the polarization state of transmitted light. [0003] However, the regulating electric field or magnetic field signals loaded in the above methods are all generated by electronic circuits, and their switching speed is limited by the respo...

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Problems solved by technology

[0003] However, the regulating electric field or magnetic field signals loaded in the above methods are all dependent on the generation of electronic circuits, and their switching speed is limited by the response speed of the circuit.

In addition, if similar components are used in modern optical information communication systems, the conversion between electrical signals and optical signals is accompanied by the conversion between electrical signals and optical signals during the information code generation and regulation stages, resulting in a waste of time and limiting the transmission rate and bandwidth of information in the communication system

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