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US 2008/0173812 A1Published application
Spin microscope based on optically detected magnetic resonance
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsGennady P. Berman, Boris M. Chernobrod
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Abstract
The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of impaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.
Claims30
A scanning magnetic microscope comprising;
- an ultrasensitive micro-cantilever onto the free end of which is fixed a photoluminescent nanoprobe;
- a sample of dilute paramagnetic particles exhibiting electron spins which is closely positioned, in the range of tens of nanometers, to said nanoprobe;
- a permanent magnet placed nearby for inducing an external magnetic field upon said nanoprobe and said sample of dilute paramagnetic particles;
- a radio frequency coil placed nearby for inducing an external radio frequency field upon said nanoprobe and said sample of dilute paramagnetic particles;
- an optical fiber placed in close proximity to said nanoprobe for introducing an evanescent laser exciting light upon said nanoprobe at a frequency resonant with the transition between the magnetic sublevels of said nanoprobe;
- and
- a detector, positioned at a 45 degree angle to said nanoprobe and said sample of dilute paramagnetic particles in both plan and elevation views, capable of optically recognizing the photoluminescent intensity of transition emissions given off by said nanoprobe when excited.
4 more elements
A scanning magnetic microscope comprising:
- an ultrasensitive micro-cantilever onto the free end of which is fixed a photoluminescent nanoprobe;
- a sample of dilute paramagnetic particles exhibiting electron spins which is mounted on a facet of a translucent prism, closely positioned, in the range of tens of nanometers, to said nanoprobe;
- a permanent magnet placed nearby for inducing an external magnetic field upon said nanoprobe and said sample of dilute paramagnetic particles;
- a radio frequency coil placed nearby for inducing an external radio frequency field upon said nanoprobe and said sample of dilute paramagnetic particles;
- an evanescent laser exciting light obliquely reflected off the underside of said facet of the translucent prism at a frequency resonant with the transition between the magnetic sublevels of said nanoprobe;
- and
- a detector, positioned at a 45 degree angle to said nanoprobe and said sample of dilute paramagnetic particles in both plan and elevation views, capable of optically recognizing the photoluminescent intensity of transition emissions given off by said nanoprobe when excited.
4 more elements
A scanning magnetic microscope comprising;
- an cantilevered optical fiber onto the free end of which is fixed a photoluminescent nanoprobe;
- a sample of dilute paramagnetic particles exhibiting electron spins which is closely positioned, in the range of tens of nanometers, to said nanoprobe;
- a permanent magnet placed nearby for inducing an external magnetic field upon said nanoprobe and sample of dilute paramagnetic particles;
- a radio frequency coil placed nearby for inducing an external radio frequency field upon said nanoprobe and said sample of dilute paramagnetic particles;
- said cantilevered optical fiber introducing an evanescent laser exciting light upon said fixed nanoprobe at a frequency resonant with the transition between the magnetic sublevels of said nanoprobe;
- and
- a detector, positioned at a 45 degree angle to said nanoprobe and said sample of dilute paramagnetic particles in both plan and elevation views, capable of optically recognizing the photoluminescent intensity of transition emissions given off by said nanoprobe when excited.
4 more elements
A scanning magnetic microscope comprising:
- a scanning tunneling microscope upon the apex of the tip of said scanning tunneling microscope is placed a photoluminescent nanoprobe;
- a sample of dilute paramagnetic particles exhibiting electron spins which is closely positioned, in the range of tens of nanometers, to said nanoprobe;
- a permanent magnet placed nearby for inducing an external magnetic field upon said nanoprobe and said sample of dilute paramagnetic particles;
- a radio frequency coil placed nearby for inducing an external radio frequency field upon said nanoprobe and said sample dilute paramagnetic particles;
- an optical fiber placed in close proximity to said nanoprobe for introducing an evanescent laser exciting light upon said nanoprobe at a frequency resonant with the transition between the magnetic sublevels of said nanoprobe;
- and
- a detector, positioned at a 45 degree angle to said nanoprobe and said sample of dilute paramagnetic particles in both plan and elevation views, capable of optically recognizing the photoluminescent intensity of transition emissions given off by said nanoprobe when exicited.
4 more elements
A scanning magnetic microscope comprising:
- an ultrasensitive micro-cantilever onto the free end of which is fixed a photoluminescent material which exhibits an optically detectable magnetic resonance;
- a sample of dilute paramagnetic particles exhibiting electron spins which is closely positioned, in the range of tens of nanometers, to said photoluminescent material;
- a permanent magnet placed nearby for inducing an external magnetic field upon said photoluminescent material and said sample of dilute paramagnetic particles;
- a radio frequency coil placed nearby for inducing an external radio frequency field upon said photoluminescent material and said sample of dilute paramagnetic particles;
- an optical fiber placed in close proximity to said photoluminescent material for introducing an evanescent laser exciting light upon said photoluminescent material at a frequency resonant with the transition between the magnetic sublevels of said photoluminescent material;
- and
- a detector, positioned at a 45 degree angle to said photoluminescent material and said sample of dilute paramagnetic particles in both plan and elevation views, capable of optically recognizing the photoluminescent intensity of transition emissions given off by said photoluminescent material when excited.
4 more elements
Dependencies are inferred from the claim text.