Imaging and focusing of atoms by a fresnel zone plate
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 λdB=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 λdB=1.96 Å the focal length is 0.45 m. The imaging properties of the zone plate are presented and compared with numerical calculations.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1991
- DOI:
- 10.1103/PhysRevLett.67.3231
- Bibcode:
- 1991PhRvL..67.3231C
- Keywords:
-
- 42.80.Bi;
- 35.80.+s