Abstract
A neutral, ground-state, atom beam has been focused using Fresnel zone plates. At only moderate demagnification , a focused spot diameter of is achieved at a signal intensity of 500 counts/s. This is an improvement over previous work by a factor of 10 in resolution, in signal intensity, and in focused beam density, and allows the full intrinsic intensity profile of a focused atomic Fresnel spot to be measured for the first time. Raster scans of 15 and wide slits across the focused spot demonstrate transmission scanning helium de Broglie microscopy of micron resolution.
- Received 27 July 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.4229
©1999 American Physical Society