Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits
- URL: http://arxiv.org/abs/2406.17607v2
- Date: Thu, 27 Jun 2024 13:56:31 GMT
- Title: Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits
- Authors: Clayton L. Craft, Nicholas J. Barton, Andrew C. Klug, Kenneth Scalzi, Ian Wildemann, Pramod Asagodu, Joseph D. Broz, Nikola L. Porto, Michael Macalik, Anthony Rizzo, Garrett Percevault, Christopher C. Tison, A. Matthew Smith, Michael L. Fanto, James Schneeloch, Erin Sheridan, Dylan Heberle, Andrew Brownell, Vijay S. S. Sundaram, Venkatesh Deenadayalan, Matthew van Niekerk, Evan Manfreda-Schulz, Gregory A. Howland, Stefan F. Preble, Daniel Coleman, Gerald Leake, Alin Antohe, Tuan Vo, Nicholas M. Fahrenkopf, Todd H. Stievater, Kathy-Anne Brickman-Soderberg, Zachary S. Smith, David Hucul,
- Abstract summary: We report a CMOS foundry-produced, micro-fabricated silicon nitride (Si3N4) optical waveguide for addressing a chain of eight trapped barium ions.
The crosstalk mitigation techniques incorporated into the chip design result in a reduction of the measured optical field by at least 50.8 (1.3) dB.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Reliable control of quantum information in matter-based qubits requires precisely applied external fields, and unaccounted for spatial cross-talk of these fields between adjacent qubits leads to loss of fidelity. We report a CMOS foundry-produced, micro-fabricated silicon nitride (Si3N4) optical waveguide for addressing a chain of eight, unequally-spaced trapped barium ions with crosstalk compatible with scalable quantum information processing. The crosstalk mitigation techniques incorporated into the chip design result in a reduction of the measured optical field by at least 50.8(1.3) dB between adjacent waveguide outputs near 650 nm and similar behavior for devices designed for 493 nm and 585 nm. The waveguide outputs near 650 nm, along with a global laser near 493 nm were used to laser-cool a chain of eight barium-138 ions, and a camera imaged the resulting fluorescence at 493 nm.
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