Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording

A double-pulse, super-resolution technology, applied in magnetic recording, combined recording, data recording, etc., can solve the problem of limited storage density laser pulse diffraction limit, achieve the effect of reducing the distance and increasing the magnetic recording density

Active Publication Date: 2021-03-26
JINAN UNIVERSITY
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, CN201811154711.9 discloses an ultra-fast / high-density data storage method using first-order hand-polarized vortex light, which has ultra-fast and high-density storage characteristics, but its storage density is limited by laser Diffraction-limited pulse

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording
  • Double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording
  • Double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0035] like Figures 1 to 7As shown, a double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording in this embodiment includes a first excitation pulse and a second adjustment pulse, both of which are femtosecond laser pulses , the energy density of the second adjustment pulse is smaller than that of the first excitation pulse; after the first excitation pulse and the second adjustment pulse are focused, they are successively incident on the magneto-optical recording medium so that the area irradiated by the laser pulse spot produces all-optical magnetic Inversion; the optomagnetic recording medium is a optomagnetic material capable of realizing all-optical-magnetic inversion of a single laser pulse, and the minimum energy density threshold required for its single-laser pulse to realize all-optical-magnetic inversi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording, and the method comprises the steps: enabling a first excitation pulse and a second adjustment pulse to sequentially enter an optical magnetic recording medium, so as to enable an area, irradiated by a laser pulse light spot, of the optical magnetic recording medium to generate all-optical magnetic inversion; by accurately and flexibly controlling the time delay, the space overlapping region and the energy density ratio between the double femtosecond laser pulses, secondary inversion of a magnetization field can be induced to be generated in the space overlapping region of the two pulses on the optomagnetic material capable of realizing single-pulse all-optical magnetic inversion, so that all-optical magnetic recording exceeding diffraction limit limitation is obtained; the recording process occurs at the time scale of hundreds of picoseconds (sub-nanoseconds), and aneffective technical means is provided for ultra-high-density and ultra-fast magnetic storage.

Description

technical field [0001] The invention belongs to the technical field of optical-magnetic storage, and in particular relates to a double-pulse excitation method for ultrafast super-resolution all-optical magnetic recording. Background technique [0002] In the field of big data storage, using an external magnetic field to realize the magnetization reversal of magnetic materials, that is, the traditional magnetic storage technology, is the most mainstream data storage technology today. However, in this technique, the electron spin completes the reversal process in the form of precession, and its characteristic time is several nanoseconds, which greatly limits the rate of magnetic reversal (A.Kirilyuk, et al., Rev. Mod. Phys. 82, 2731 (2010)). The discovery of all-optical magnetic inversion has injected fresh vitality into the research and application development of ultra-high-speed magnetic storage. Studies have shown that under the condition of no external magnetic field, on...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B11/105
CPCG11B11/10504G11B13/045
Inventor 王思聪魏琛李向平
Owner JINAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com