Speakers
Description
A novel approach for the fabrication of glass-based atomic vapor cells is presented, combining laser-assisted glass structuring and a hermetic glass joining technique. The structure of these glass-based cells includes three glass chips stacked on top of each other, with the central chip containing interconnected cavities. Glass structuring using selective laser-induced etching (SLE) process affords great design flexibility for the connecting channel structure as well as three-dimensional structuring of the cavities in transparent materials such as quartz glass or borosilicate glass. The length of the optical path through the vapor cell is determined by the thickness of the central chip, which can be adjusted up to 10 mm. This allows the interaction length to be customised based on experimental requirements. The glass chips are sealed under vacuum conditions using an advanced glass joining technique. Alkali atoms are then introduced into the vapor cell via laser activation of an alkali metal dispenser. For the proof of concept, vapor cells with a 1 mm thick central chip were manufactured, as shown in figure 1. In initial measurements, a Rb spectrum (figure 2) of the fabricated cells was successfully recorded using laser spectroscopy, demonstrating both hermetic sealing and successful laser activation of the dispenser pill.
