Single Ion Imaging and Fluorescence Collection with a Parabolic Mirror Trap

Abstract

Single trapped ion qubit is an excellent candidate for quantum computation and information, with additional ability to coherently couple to single photons. Efficient fluorescence collection is the most challenging part in remote entangled ion qubit state generation. To address this issue, we developed an ion trap combining a reflective parabolic surface with trap electrodes. This parabolic trap design covers a solid angle of 2pi steradians, and allows precise ion placement at the focal point of the parabola. We measured approximately 39% fluorescence collection from a single ion with this mirror, and analyzed the mirror optical performance. We observed single ion image spot size of about 3.4 times diffraction limit, improved to 2.8 times diffraction limit with the help of an external deformable mirror. The micromotion of ion is determined to be the limiting factor, and the result is consistent with theoretical calculation.

References in corpus (5)

• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• Ion traps with enhanced optical and physical access
• Observation of Entanglement Between Itinerant Microwave Photons and a Superconducting Qubit
• UV-sensitive superconducting nanowire single photon detectors for integration in an ion trap
• Scalable ion-photon quantum interface based on integrated diffractive mirrors

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• Bichromatic UV detection system for atomically-resolved imaging of ions
• Doubly-ionized lanthanum as a qubit candidate for quantum networks