Abstract

Femtosecond laser structuring is applied to produce linear ion traps of AlN ceramics. Such ion trap can serve as an optical clock with exceptionally high long term stability [1]. The selection of techniques, applicable to the high precision microstructuring of AlN ceramics, is limited due to high hardness and fragility of the material. Laser structuring is very attractive for this application. However, long laser pulses cause thermal decomposition and surface metallization of AlN ceramics [2]. A femtosecond laser allows material removal without adverse heat effects. At the same time high quality surface finish together with aspect ratios and precision as required for optical ion trap clocks are ensured.

© 2013 IEEE