Detecting method and its device for double light beam-two angle super short pulse laser pumping

An ultra-short pulse laser and detection method technology, applied in the field of ultra-short pulse laser testing technology, can solve the problems of dynamics research, inability to carry out effective testing, insufficient time resolution, etc.

Inactive Publication Date: 2007-04-11
JIANGSU UNIV
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although they can provide useful information on the magnetic transition of the short-range ordered structure of the crystal, they cannot be effectively tested for the magnetic transition of the long-range ordered structure and the magnetic transition processes such as melting and amorphization. The study of subharmonic and lattice parameters cannot directly study the kinetics of the magnetic transition process
At the same time, these methods are all ultra-fast test methods above the picosecond level, and the time resolution of the femtosecond-level ultrafast magnetic transition process is still far from enough, so it is impossible to directly study the dynamics of the magnetic transition process

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
  • Detecting method and its device for double light beam-two angle super short pulse laser pumping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Taking the schematic diagram of the double-beam-two-angle pumping detection device shown in FIG. 1 as an example, the details of the test device and samples and the specific implementation of the detection process in the present invention will be described in detail.

[0018] The test object takes the giant magnetostrictive material thin film as an example: TbDyFe and NiMnGa two kinds of giant magnetostrictive material thin films are prepared by DC magnetron sputtering method, and the coating substrates are silicon wafer and glass. Preparation of film is that the used target is Tb0.3Dy0.7Fe2 (99.9%) and Ni 2 MnGa (99.9%) alloy, the coating negative film is silicon wafer and glass wafer with a thickness of 0.5mm, and the vacuum degree is 2×10 -5 Pa, the sputtering gas is high-purity argon with a pressure of 0.6Pa. The sputtering power is 60W, the sputtering speed is 0.06nm / s, and the finally obtained film thickness is about 600nm. Other test samples include GaAs and In...

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

No PUM Login to view more

Abstract

The present invention relates to ultrashort pulse laser testing technology, and is especially pumping and detecting method and device of double beam and two angle ultrashort pulse laser. The pulse laser beam the ultrashort pulse laser emits is split into two beams in the beam splitter, includes one as the pumping laser beam and one as the detecting laser beam. The detecting laser beam is delayed in a delay line and split in a beam splitter into two beams incoming to the surface of the sample in different angle, two photo detectors receive the reflected signals independently, the signals are acquired with one phase-lock amplifier and one computer, and the data are processed in the computer to obtain the optical characteristic curve of the sample. The present invention can measure both dielectric constant and light beam polarizing value of material, and realize precise determination of physical parameters in the conversion process in the time resolution of femtosecond level.

Description

technical field [0001] The invention relates to an ultrashort pulse laser testing technology, in particular to a double-beam-two-angle ultrashort pulse laser pumping detection method and its device, which adopts an ultrashort pulse laser and uses pumping detection technology to quantitatively study the magnetic transition of material structure. The fast dynamic process belongs to the field of laser testing technology and material science, and can realize the test of the ultrafast transition process inside the crystal and thin film structure of various materials. Background technique [0002] Terahertz operating frequency microstructures are currently a research hotspot and difficulty in the field of micro-nano science. Quite a few scientists are working on the design and manufacture of various terahertz microstructures for micro-execution and micro-drivers, but there are very few successful reports. . [0003] The study of magnetic transition is an important branch of physi...

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): G01R27/26G01R33/12G01N21/17
Inventor 周明陈磊任乃飞蔡兰
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap