Sub-micron period lattice structures of magnetic microtraps for ultracold atoms on an atom chip. (24th February 2015)

• Record Type: Journal Article
• Authors: Herrera, I; Wang, Y; Michaux, P; Nissen, D; Surendran, P; Juodkazis, S; Whitlock, S; McLean, R J; Sidorov, A; Albrecht, M; Hannaford, P
• Is Part Of: Journal of physics. Volume 48:Number 11(2015)
• Publication Date: 2015-02-24
• Subjects: magnetic lattice -- applications of multi-layered magnetic films -- Bose–Einstein condensate -- atom chip; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/48/11/115002
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: We report on the design, fabrication and characterization of magnetic nanostructures to create a lattice of magnetic traps with sub-micron period for trapping ultracold atoms. These magnetic nanostructures were fabricated by patterning a Co/Pd multilayered magnetic film grown on a silicon substrate using high precision e-beam lithography and reactive ion etching. The Co/Pd film was chosen for its small grain size and high remanent magnetization and coercivity. The fabricated structures are designed to magnetically trap 87 Rb atoms above the surface of the magnetic film with one-dimensional and two-dimensional (triangular and square) lattice geometries and sub-micron period. Such magnetic lattices can be used for quantum tunneling and quantum simulation experiments, including using geometries and periods that may be inaccessible with optical lattices.