Volume 84, Issue 12, 15 December 1998
Index of content:
- GENERAL PHYSICS: NUCLEAR, ATOMIC, AND MOLECULAR (PACS 01-39)
Near-field diffraction by a slit in a thick perfectly conducting screen flying above a magneto-optical disk84(1998); http://dx.doi.org/10.1063/1.369017View Description Hide Description
A two-dimensional analysis is presented for the near-field diffraction of a plane wave incident upon a slit in a thick perfectly conducting screen flying above a magneto-optical disk. The angle and polarization of the incident wave are arbitrary. The screen thickness, slit width, and fly height are all on the order of a wavelength or less. The disk is treated as a thin-filmmultilayer stack on a semi-infinite substrate. Any combination of the thin-film layers can be magneto-optically active. Thus, polarization is not necessarily preserved. The fields and their polarizations within and around the slit are determined by rigorously solving Maxwell’sequations with the appropriate boundary conditions imposed by both the slit and the disk. The solution, which involves Fourier transforms and mode expansions, is based upon a method developed previously by other researchers to investigate scattering systems composed of slits in thick conductors only. In this article, their method is extended to include systems that also have thin-filmmultilayer media which can change polarization. The extended theory, numerical issues, and example calculations are presented and discussed.
84(1998); http://dx.doi.org/10.1063/1.369018View Description Hide Description
We report an efficient method to load atoms into a magneto-optical trap. A resistively heated alkali metal dispenser, which is mounted close to the trapping region, serves as a compact, pulsed source for Rb atoms. The atoms are captured by the magneto-optical trap within less than 3 s at a loading rate of more than atoms per second. The lifetime of the trapped atoms exceeds the filling time by about 30 s.