Speaker
Description
Penning micro-traps offer a promising scalable architecture for trapped-ion quantum computation. Individually confined low-mass $^{9}\mathrm{Be}^{+}$ ions in a homogeneous magnetic field enable strong spin-motion coupling and potentially faster entangling gates compared to heavier species such as $\mathrm{Ca}^{+}$, while reducing laser overhead due to a simpler level structure.
Integrated waveguide beam delivery presents an attractive approach for coupling light into cryogenic vacuum environments, alleviating the complexity of free-space alignment and improving long-term stability in the presence of static trap potentials. However, operation at \SI{313}{\nano\meter}, required for the $\mathrm{S}_{1/2} \leftrightarrow \mathrm{P}_{3/2}$ transitions, poses significant material and fabrication challenges. Recent advances in Al$_2$O$_3$-based photonic integrated circuits have demonstrated suitability for deep-UV applications.
Here, we present the development of a dedicated photonic integrated circuit (PIC) characterisation platform for \SI{313}{\nano\meter} operation. We investigate propagation losses, transmission stability under continuous UV exposure, and the spatial profiles of beams outcoupled via resonant waveguide gratings.
| Academic level | Master's Student |
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