Regensburg 2019 – scientific programme

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O: Fachverband Oberflächenphysik

O 68: Poster Wednesday: Nanostructures

O 68.8: Poster

Wednesday, April 3, 2019, 17:45–20:00, Poster B2

Fabrication of metallic microstructures on optical fibers — •Alexander Faßbender and Stefan Linden — Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn, Germany

Fiber cavities have emerged to be a promising tool for the fabrication of a quantum memory cell. Based on the compactness and robustness of atom/ion traps that can be realized with fiber cavities, they are a candidate for the realization of quantum repeater nodes. We report on the fabrication of metallic microelements on optical fibers. A polymer mask is created on a cleaved end of the fiber using three-dimensional laser writing based on the principle of two photon absorption. A layer of gold is then thermally evaporated. After the removal of the polymer mask, four gold electrodes remain, separated by thin stripes that arise from the shadow of the polymer mask. The core of the fiber is protected as well, so the in- and outcoupling of light is not affected by the microstructures. When using these fibers in a cavity, the light-matter action can be manipulated. We envision that our microstructured fibers can be employed to realize compact ion traps inside of a fiber resonator.