Abstract
Focusing of and imaging with atoms by means of a spherical Fresnel zone plate has been observed for the first time. An intense beam of metastable helium atoms with atomic de Broglie wavelength =0.5–2.5 Å is passed through either a single or a double slip with dimensions in the 10-μm range. This transverse intensity distribution is imaged by a Fresnel zone plate, 210 μm in diameter and with an innermost zone diameter of 18.76 μm. For =1.96 Å the focal length is 0.45 m. The imaging properties of the zone plate are presented and compared with numerical calculations.
- Received 26 August 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.3231
©1991 American Physical Society