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High performance MEMS based multi-color, multi-beam steering system for 2D addressing of atomic qubits

Caleb Knoernschild, Duke University

(Session : Thursday from )

Abstract. The ability to efficiently deliver laser resources to multiple trap locations in atomic based quantum computer experiments is necessary to move beyond demonstrations of individual quantum gates. Optical beam steering systems utilizing micro-electromechanical system (MEMS) technology can provide the scalability and flexibility to effectively distribute multiple, independent lasers to a 1D or 2D qubit array. Fabrication techniques of micro mirrors in combination with reflective broadband metal coatings enable concurrent multi-wavelength beam steering along multiple beam paths as well as wavelength multiplexing along the same beam path. We have demonstrated a MEMS based beam steering system that directs two separate wavelengths to any of 25 locations in a 5x5 array. This system features fast switching time where mirrors with <5 us settling time have been fabricated as well as minimal optical intensity at neighboring array locations. System modeling and simulations as well as characterization of mirrors speeds, alternative mirror fabrication processes, reflectivity quality, and power handling capabilities will also be presented.