The atomic microscope de Broglie (also atomic nanoscope , neutral light microscope , or scanning helium microscope when helium is used as atom probing) is an imaging system that is expected to provide resolution at the nanometer scale. Sometimes people call it nano scope.
Video Atomic de Broglie microscope
Histori
Optical microscope resolutions are limited to a few hundred nanometers by the nature of light waves.
The idea of ​​imaging with atoms instead of light is widely discussed in the literature since the last century. Optical atoms using neutral atoms rather than light can provide resolution as well as electron microscopy and are not at all destructive, since the short wavelengths in the nanometer sequence can be realized at the low energy of the probing particles. "This means that a helium microscope with nanometer resolution is possible.The helium atomic microscope will be a unique non-destructive tool for reflection or transmission microscopy."
Maps Atomic de Broglie microscope
Focusing the neutral atom
Currently, atomic-optic imaging systems are not competitive with electron microscopes and various types of near-field probes. The main problem in atomic beam optics for imaging systems is the focusing element. There is no transparent material in the low-energy atomic beam. A Fresnel zone plate and evanescent field lenses are recommended, as well as a variety of atomic mirrors. Such mirrors use a quantum reflection by the Casimir-van der Waals potential tail.
Jagged Mirror
Recently, the performance of the solid-state atomic mirrors has greatly improved with so-called jagged mirrors (or Fresnel diffraction mirrors). The speculative reflection of atomic waves from jagged mirrors can be interpreted as Zeno spatial effects. In the appropriate ellipsoidal profile, such a mirror can be used to focus an atomic ray to a point from a few dozen nanometers; atomic scattering from this point carries the image of the object, as in scanning confocal microscope, scanning electron microscope, or scanning probe microscopy.
The schematic shown in the picture is one possibility. A similar scheme was installed on the homepage of Cambridge University; see the list of additional references there. Such imaging systems can also be realized with holographic, Fresnel diffraction, and evanescent wave systems. Some such systems can be competitive with nanomedic visualization and measurement methods. See the overview at Nanowiki (Nanotechnology).
See also
- Atomic Optics
- The atomic mirror
- Quantum Reflection
- The jagged mirror
- Grinding Angle
- Zeno effect
- Matter wave
- Scans Helium Ion Microscope
References
Source of the article : Wikipedia
0 Comments