Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 37: Poster III
Q 37.21: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent B
Optical integration with femto-second laser written waveguides — •Marco Schmauser1, Philipp Schindler1, Thomas Monz1, Marco Valentini1, Jakob Wahl1,2, Alexander Zesar2,3, Klemens Schueppert2, Bernhard Lamprecht4, Philipp Hurdax4, Clemens Rössler2, and Rainer Blatt1,5 — 1Universität Innsbruck, Innsbruck, Austria — 2Infineon Technologies Austria AG, Villach, Austria — 3Universität Graz, Graz, Austria — 4Joanneum Research, Weiz, Austria — 5Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Austria
Current ion trap quantum computing systems usually make use of free-space optics to deliver the light to the ions. This practice makes the setups susceptible to drifts and vibrations and limits the number of ions which can be manipulated. For a scalable system it is thus necessary to increasingly integrate optical elements from external components directly into the ion trap.
We use femto-second laser pulses to write single-mode and polarization-maintaining waveguides directly into borofloat glass. Unlike other materials used in CMOS technology, borofloat glass is transparent for ultraviolet light required for the manipulation of 40Ca+ ions. Henceforth, a microstructured surface trap was realized featuring two of these waveguides, one for 397nm light and one for 729nm light. In parallel, we build up an integrated cryogenic quantum computing system to enable fast trap testing and to investigate the quality of the light delivery to the ions.
Keywords: Optical Integration; Waveguides; Trapped Ions; Surface trap; Quantum Computation