Accession Number : ADA328424

Title :   Atomic Interference in Standing Wave Fields.

Descriptive Note : Final progress rept. 1 Sep 93-28 Feb 97,

Corporate Author : MICHIGAN UNIV ANN ARBOR DIV OF RESEARCH DEVELOPMENT AND ADMINISTRATION

Personal Author(s) : Berman, Paul R.

PDF Url : ADA328424

Report Date : 14 MAY 1997

Pagination or Media Count : 5

Abstract : Experimental and theoretical research has been carried out with the long term goal of producing nanostructures by passing an atomic beam through one or more standing wave optical fields. Theoretical estimates are consistent with the prospect of creating structures having periods on the order of tens of angstroms. During the final period of this grant, we have been able to demonstrate a de Broglie wave atom interferometer operating in the time domain. The interferometer was used to obtain preliminary measurements of h*constant/m (m is the atomic mass) and the acceleration of gravity. The interferometer is novel in that it can operate on a single, nondegenerate ground state and relies critically on quantization of the atomic center-of-mass motion for its operation, in contrast to some other classes of atom interferometers. The experimental line shapes are in good agreement with theoretical predictions that incorporate subtle interference phenomena associated with phase gratings. The data provides indirect evidence for the existence of spatial harmonics in the atomic density having a period lambda/6, where lambda is the wavelength of the optical fields. A theory of Ramsey-fringe atom interferometry has been developed suggesting new experiments that could provide unprecedented accuracy for measurements of h*constant/m and inertial effects.

Descriptors :   *INTERFEROMETERS, SPATIAL DISTRIBUTION, OPTICAL PROPERTIES, INERTIA, MASS, HARMONICS, ATOMS, GRATINGS(SPECTRA), MATHEMATICAL PREDICTION, GROUND STATE, TIME DOMAIN, STANDING WAVES, ATOMIC BEAMS, NANOTECHNOLOGY.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE