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This breakthrough integrates femtosecond-laser-written waveguides directly into borosilicate glass ion traps, overcoming previous limitations in light delivery for trapped-ion quantum systems. By enabling low-loss curved paths with a 6mm radius of curvature, the platform facilitates scalable on-chip photonics and simplifies optical circuit miniaturization as qubit counts increase.

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Researchers Build Integrated Waveguide for Ion Traps

Quantum ZeitgeistAugust 17, 20264 min read

Ion traps now incorporate curved waveguides with a 6mm radius of curvature, a feat previously unattainable. This platform extends single-mode light delivery to 405nm, enabling tighter integration of photonics with trapped-ion systems. Borosilicate glass fabrication, combined with femtosecond-laser writing, offers a new pathway for scalable on-chip light delivery and coherent ion control.

Until now, delivering light to trapped ions required complex free-space optics that become impractical as the number of qubits increases. Now, the researchers have developed an ion-trap platform on borosilicate glass with an integrated femtosecond-laser-written waveguide for on-chip light delivery. This system achieves low-loss curved waveguides down to a radius of curvature of 6mm, and successfully demonstrated trapping, ion shuttling, and coherent operations using 729nm light guided through the integrated waveguide. Researchers have engineered a new ion trap using glass channels…

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