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Fiber cavity with membrane on the left fiber mirror.

Loop antenna realized on an optical fiber; the fiber diameter is 125 µm.

Rectangular membrane (scanning electron microscope image).

Single loop microwave near-field antenna design for driving magnetic dipole transitions of atoms and ions.

Here, a fiber cavity is used together with an ion trap. For electrostatic shielding, the fibers are guided inside thin stainless steel tubes (horizontal) ...

A single Ytterbium trapped inside the cavity volume, and its blue fluorescence (composite image).

Two optical fiber mirrors are inserted into a glass ferrule glued on a piezoelectric actuator, to form a very compact monolithic fiber cavity.

3D direct laser writing system “Photonic Professional GT” by Nanoscribe GmbH

Monolithic fiber cavity shown with 1-cent coin shown for size comparison.

The resulting four electrodes, connected around the edge to the four bond pads.