Micron-sized atom traps made from magneto-optical thin films
S. Eriksson (1), F. Ramirez-Martinez (1), E. A. Curtis (1), B. E., Sauer (1), P. W. Nutter (2), E. W. Hill (2), E. A. Hinds (1), ((1) Imperial, College, London, UK, (2) University of Manchester, Manchester, UK)
TL;DR
This paper demonstrates the creation of micron-scale magnetic atom traps using laser-induced domain reversal in Co/Pt thin films, enabling high-frequency trapping of rubidium atoms for quantum manipulation.
Contribution
It introduces a novel method of patterning magnetic thin films with sub-micron precision for atom trapping applications.
Findings
Microtraps with ~1 MHz trap frequencies achieved.
Controlled domain reversal enables precise magnetic patterning.
Traps are suitable for neutral atom manipulation.
Abstract
We have produced magnetic patterns suitable for trapping and manipulating neutral atoms on a m length scale. The required patterns are made in Co/Pt thin films on a silicon substrate, using the heat from a focussed laser beam to induce controlled domain reversal. In this way we draw lines and "paint" shaped areas of reversed magnetization with sub-micron resolution. These structures produce magnetic microtraps above the surface that are suitable for holding rubidium atoms with trap frequencies as high as ~1 MHz.
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