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Wide-spectrum all-optical switch

An all-optical switch and wide-spectrum technology, which is applied in the field of wide-spectrum all-optical switches, can solve the problems of high switching speed, low signal light transmittance, low extinction ratio of vanadium dioxide film, etc., to reduce sensitivity and facilitate integration Effect

Inactive Publication Date: 2015-06-17
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although vanadium dioxide has good repeatable reversible phase transition and high switching speed, the extinction ratio of vanadium dioxide film itself is not high
In order to increase the extinction ratio, the thickness of the vanadium dioxide film must be increased, which will inevitably lead to a decrease in the signal light transmittance.

Method used

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  • Wide-spectrum all-optical switch
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  • Wide-spectrum all-optical switch

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0037] figure 1 A schematic cross-sectional structure diagram of the wide-spectrum all-optical switch of this embodiment is shown, including a composite vanadium dioxide film 14 and a metal grating 15 , and the composite vanadium dioxide film 14 and metal grating 15 are located on a transparent substrate 16 .

[0038] The transparent substrate 16 can be made of various suitable transparent materials, specifically a glass substrate in this embodiment.

[0039] The metal grating 15 can be located on the upper layer of the vanadium dioxide film 14 or buried in the lower layer of the vanadium dioxide film 14 . In this embodiment, the metal grating 15 is buried in the lower layer of the vanadium dioxide film 14 , and the metal grating 15 is in contact with the transparent ...

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Abstract

The invention provides a wide-spectrum all-optical switch. The switch comprises compounded vanadium dioxide film and metal gratings. The photoinduced phase change of the vanadium dioxide film and accompanying infrared transmittance change are controlled by control light, and an infrared band can be subjected to polarization selection by using the polarization selection characteristic of the metal gratings. An extinction ratio can be improved, the thickness and transverse size of the whole structure are far smaller than a wavelength, and a high extinction ratio can be achieved under the condition of sub-wavelength size. In addition, the switch is insensitive to an incident angle and has a low requirement on collimation of a light path.

Description

technical field [0001] The invention relates to a wide-spectrum all-optical switch, in particular to a wide-spectrum all-optical switch with a compound structure of a vanadium dioxide film and a metal grating. Background technique [0002] Compared with traditional electrical technology, optical information acquisition and processing has the advantages of faster processing speed, wider bandwidth and easy parallel processing. This is not only reflected in the fields of optical communication and optical computing, but also in human-computer interaction terminals, direct optical image acquisition and processing has more obvious advantages than electrical means. However, although advanced optical technology has been widely used, such as optical fiber communication, one of the necessary devices—optical modulators (including optical switches) still largely relies on electro-optic modulation technology, which needs to be controlled by electrical signals (Yariv , A, Quantum Electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01
Inventor 陆亚林张璇如王威朱彦武陈俊华赵元
Owner UNIV OF SCI & TECH OF CHINA