Near Field Magneto-Optical Microscope
Abstract
A device and method for mapping magnetic fields of a sample at a resolution less than the wavelength of light without altering the magnetic field of the sample is disclosed. A device having a tapered end portion with a magneto-optically active particle positioned at the distal end thereof in communication with a fiber optic for transferring incoming linearly polarized light from a source thereof to the particle and for transferring reflected light from the particle is provided. The fiber optic has a reflective material trapping light within the fiber optic and in communication with a light detector for determining the polarization of light reflected from the particle as a function of the strength and direction of the magnetic field of the sample. Linearly polarized light from the source thereof transferred to the particle positioned proximate the sample is affected by the magnetic field of the sample sensed by the particle such that the difference in polarization of light entering and leaving the particle is due to the magnetic field of the sample. Relative movement between the particle and sample enables mapping.
- Inventors:
-
- Downers Grove, IL
- Lisle, IL
- Chicago, IL
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 880622
- Patent Number(s):
- 6972562
- Application Number:
- 10/945953
- Assignee:
- The United States of America as represented by the United States Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01Q - SCANNING-PROBE TECHNIQUES OR APPARATUS
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- DOE Contract Number:
- W-31-109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Vlasko-Vlasov, Vitalii K, Welp, Ulrich, and Crabtree, George W. Near Field Magneto-Optical Microscope. United States: N. p., 2005.
Web.
Vlasko-Vlasov, Vitalii K, Welp, Ulrich, & Crabtree, George W. Near Field Magneto-Optical Microscope. United States.
Vlasko-Vlasov, Vitalii K, Welp, Ulrich, and Crabtree, George W. Tue .
"Near Field Magneto-Optical Microscope". United States. https://www.osti.gov/servlets/purl/880622.
@article{osti_880622,
title = {Near Field Magneto-Optical Microscope},
author = {Vlasko-Vlasov, Vitalii K and Welp, Ulrich and Crabtree, George W},
abstractNote = {A device and method for mapping magnetic fields of a sample at a resolution less than the wavelength of light without altering the magnetic field of the sample is disclosed. A device having a tapered end portion with a magneto-optically active particle positioned at the distal end thereof in communication with a fiber optic for transferring incoming linearly polarized light from a source thereof to the particle and for transferring reflected light from the particle is provided. The fiber optic has a reflective material trapping light within the fiber optic and in communication with a light detector for determining the polarization of light reflected from the particle as a function of the strength and direction of the magnetic field of the sample. Linearly polarized light from the source thereof transferred to the particle positioned proximate the sample is affected by the magnetic field of the sample sensed by the particle such that the difference in polarization of light entering and leaving the particle is due to the magnetic field of the sample. Relative movement between the particle and sample enables mapping.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 06 00:00:00 EST 2005},
month = {Tue Dec 06 00:00:00 EST 2005}
}