Precise positioning of an ion in an integrated Paul trap-cavity system using radiofrequency signals

Kassa, Ezra, Takahashi, Hiroki, Christoforou, Costas Marios and Keller, Matthias (2018) Precise positioning of an ion in an integrated Paul trap-cavity system using radiofrequency signals. Journal of Modern Optics, 65 (5-6). pp. 520-528. ISSN 0950-0340

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We report a novel miniature Paul ion trap design with an integrated optical fibre cavity which can serve as a building block for a fibre-linked quantum network. In such cavity quantum electrodynamic set-ups, the optimal coupling of the ions to the cavity mode is of vital importance and this is achieved by moving the ion relative to the cavity mode. The trap presented herein features an endcap-style design complemented with extra electrodes on which additional radiofrequency voltages are applied to fully control the pseudopotential minimum in three dimensions. This method lifts the need to use three-dimensional translation stages for moving the fibre cavity with respect to the ion and achieves high integrability, mechanical rigidity and scalability. Not based on modifying the capacitive load of the trap, this method leads to precise control of the pseudopotential minimum allowing the ion to be moved with precisions limited only by the ion’s position spread. We demonstrate this by coupling the ion to the fibre cavity and probing the cavity mode profile.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Subjects: Q Science > QC Physics > QC0170 Atomic physics. Constitution and properties of matter Including molecular physics, relativity, quantum theory, and solid state physics
Q Science > QC Physics > QC0350 Optics. Light
Depositing User: Ezra Kassa
Date Deposited: 03 Jul 2018 08:26
Last Modified: 02 Jul 2019 13:45

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