Quantum 2025 – wissenschaftliches Programm
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THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.48: Poster
Donnerstag, 11. September 2025, 16:30–18:30, ZHG Foyer 1. OG
Towards Surface-Electrode Ion Traps with Chip-Integrated Near-Field Microwave Control and Integrated Photonics — •Mohammad Masum Billah1, 2, Florian Ungerechts1, Rodrigo Munoz1, Janina Bätge1, Axel Hoffmann1, 4, Giorgio Zarantonello1, 3, and Christian Ospelkaus1, 2, 5 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2Laboratorium für Nano- und Quantenengineering, Leibniz Universität Hannover — 3QUDORA Technologies GmbH — 4Institut für Hochfrequenztechnik und Funksysteme, Leibniz Universität Hannover — 5Physikalisch-Technische Bundesanstalt
Microfabricated surface-electrode ion traps provide a scalable platform for trapped-ion quantum processors. However, as chip size increases, edge clipping of free-space lasers addressing ions closely above the chip surface becomes a concern. To address this, optical waveguides and grating couplers can be embedded within the chip structure. Further, laser-free gates with chip-integrated microwave conductors have been demonstrated. The combination of both techniques significantly increases the complexity of the trap design and microfabrication. We present an overview of our recently developed single- and multilayer trap architectures with integrated microwave conductors and outline the possible integration of optical elements into these or future devices. In particular, we investigate routing strategies for electrical and optical signal paths for high interconnect density, signal integrity, and fabrication feasibility.
Keywords: Trapped-ion quantum processor; optical waveguides; grating coupler; routing; microfabrication