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Optical Information Storage Method Based on Cylindrical Vector Beam

A technology of optical information and optical storage media, applied in the field of optical information storage, can solve the problems of high cost and limited storage capacity, and achieve the effect of increasing physical dimensions, low cost, and increasing the number of storage channels

Active Publication Date: 2021-05-11
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing multi-dimensional optical information storage technology has disadvantages such as high implementation cost and limited storage capacity.

Method used

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  • Optical Information Storage Method Based on Cylindrical Vector Beam
  • Optical Information Storage Method Based on Cylindrical Vector Beam
  • Optical Information Storage Method Based on Cylindrical Vector Beam

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Embodiment 1

[0069] The coupling strength between gold nanorods greatly changes the light absorption properties of optical storage media. Under certain conditions, the long-axis dipole mode of gold nanorods will produce constructive interference in the near field to form an electromagnetic field energy hotspot. Using the vector light field at the focal spot of the columnar vector beam with different polarization distributions, different wavelengths and different polarization components can selectively excite electromagnetic energy hotspots at specific spatial locations, expanding the dimension and degree of control of the interaction between light and matter.

[0070] see image 3 , image 3 Shown is a schematic diagram of the structure of 10*10 gold nanorod arrays of the same size, image 3 The model structure shown is a simplified computational model to study the influence of the coupling strength between adjacent gold nanorods in a storage unit on the interaction characteristics of th...

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Abstract

The optical information storage method based on columnar vector beams of the present invention uses columnar vector beams to generate spatially non-overlapping electromagnetic energy hotspots in the disordered gold nanorod system, that is, to excite quasi-orthogonal local modes, thereby increasing information The physical dimension of storage multiplexing, at the same time, using the polarization orthogonality of the cylindrical vector beam and its polarization non-uniformity, the physical dimension can greatly increase the technical principle of the number of storage channels, and the multiplexing based on the cylindrical vector beam can simultaneously The technical principle realized in the same read-write focal spot simultaneously with wavelength multiplexing storage and space multiplexing storage, so as to break through the limit of storage capacity of conventional five-dimensional optical information storage technology; The characteristic mode is naturally compatible with the fiber laser, and the cost of the present invention is lower than that of traditional optical information storage using Laguerre-Gaussian beams.

Description

technical field [0001] The invention relates to the technical field of optical information storage, in particular to an optical information storage method based on a columnar vector beam. Background technique [0002] With the rapid development of the Internet of Things, artificial intelligence and other fields, human society in the 21st century has entered the era of big data with explosive growth in information volume. IDC predicts that the total amount of global data will increase by 50 times by 2020, and the demand for data storage will increase. will be greater than 50 times. The generation of massive data has brought enormous pressure to information storage technology, and put forward higher requirements for low energy consumption, high capacity, high security and long life storage of information. Existing mainstream storage methods, such as solid-state disks, hard disks, and magnetic tapes, all have disadvantages such as high power consumption, low recording density,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/26G11B7/0045G11B7/125G11B7/135
CPCG11B7/00451G11B7/125G11B7/135G11B7/26
Inventor 徐毅冼铭聪李向平欧阳旭曹耀宇
Owner JINAN UNIVERSITY
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