atom optics

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Atom optics

The use of laser light and nanofabricated structures to manipulate the motion of atoms in the same manner that rudimentary optical elements control light. The term refers to both an outlook in which atoms in atomic beams are thought of and manipulated like photons in light beams, and a collection of demonstrated techniques for doing such manipulation. Two types of atom optics elements have existed for some time: slits and holes used to collimate molecular beams (the analog of the pinhole camera), and focusing lenses for atoms and molecules (for example, hexapole magnets and quadrupole electrostatic lenses). However, in the 1980s the collection of optical elements for atoms expanded dramatically because of the use of near-resonant laser light and fabricated structures to make several types of mirrors as well as diffraction gratings. The diffraction gratings are particularly interesting because they exploit and demonstrate the (de Broglie) wave nature of atoms in a clear fashion. See Laser

Diffraction gratings

Diffraction gratings for atoms have been made by using either a standing wave of light or a slotted membrane. The standing light wave makes a phase grating (that is, it advances or retards alternate sections of the incident wavefront but does not absorb any of the atom wave), so that the transmitted intensity is high. This approach requires the complexity of a single-mode laser, and introduces the complication that the light acts differently on the various hyperfine states of the atom. The slotted membrane, however, absorbs (or backscatters) atoms which strike the grating bars, but does not significantly alter the phase of the transmitted atoms; it is therefore an amplitude grating. It works for any atom or molecule, regardless of internal quantum state, but with total transmission limited to about 40% by the opacity of the grating bars and requisite support structure. See Diffraction grating

Atom interferometers

Atom interferometers have been demonstrated through several different experimental routes, involving both microscopic fabricated structures and laser beams. These interferometers are the first examples of optical systems composed of the elements of atom optics like those discussed above. Atom interferometers, like optical interferometers, are well suited for application to a wide range of fundamental and applied scientific problems. Scientific experiments with atom interferometers divide naturally into three major categories: measurements of atomic and molecular properties, fundamental tests and demonstrations, and inertial effects.

atom optics

[¦ad·əm ′äp·tiks]
The use of laser light and nanofabricated structures to manipulate the motion of atoms in the same manner that rudimentary optical elements control light.
References in periodicals archive ?
30 to 38, New laboratory building for the research areas of quantum optics, atom optics, laser physics and geodesy.
Among the topics are chaos-assisted dynamical tunneling in atom optics, the semi-classical analysis of multi-dimensional barrier tunnels, dynamical tunneling from the edge of vibrational state space of large molecules, the tunneling of ultracold atoms in time-independent potentials, controlling photonic tunneling in coupled optical waveguides, and quantum discrete breathers.
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The achievement of matter-wave amplification suggests that atom optics might one day prove as rich and rewarding as recent developments using conventional lasers that beam photons.
Timp will deliver a paper, "Using Light as a Lens for Atom Optics," at the Condensed Matter Physics Meeting of the American Physical Society next week (March 22-26) in Seattle, Wash.
His current investigations are centered around ultrafast dynamics, coherent control, strong-field laser-matter interaction, atom optics and quantum information.
Coverage overlaps with the many texts that cover laser spectroscopy and quantum optics, but this text is distinguished by discussion of topics from a variety of viewpoints and by inclusion of topics not readily available in other introductory texts such as atom optics and interferometry, optical pumping, light scattering, and sub-Doppler laser cooling.
Recently, atom optics have been used to explore the possibility of lithography with resolutions in the few nm regime (2).
Ertmer, Atom optics with microfabricated optical elements, Optics Commun.
They are also nudging wider open the doors to a possibly powerful technology known as atom optics.
Atom optics may greatly improve the precision of certain types of measuring instruments.
The recent achievements of laser cooling and manipulation of atoms as well as latest developments in atom optics have moved the whole field to the boundary of the new regime where coherent matter wave interactions will become dominant.