Resolved-sideband Micromotion Sensing in Yb${}^{+}$ on the 935 nm Repump Transition

Abstract

Ions displaced from the potential minimum in a RF Paul trap exhibit excess micromotion. A host of well-established techniques are routinely used to sense (and null) this excess motion in applications ranging from quantum computing to atomic clocks. The rich atomic structure of the heavy ion Yb${}^{+}$ includes low-lying ${}^2{\text{D}}_{3/2}$ states that must be repumped to permit Doppler cooling, typically using a 935 nm laser coupled to the ${}^3\text{D}[3/2{]}_{1/2}$ states. In this manuscript we demonstrate the use of this transition to make resolved-sideband measurements of 3D micromotion in ${}^{172}$Yb${}^{+}$ and ${}^{171}$Yb${}^{+}$ ions. Relative to other sensing techniques our approach has very low technical overhead and is distinctively compatible with surface-electrode ion traps.

8 pages, 4 figures

References in corpus (6)

• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• Single ion-qubit exceeding one hour coherence time
• Observation of collisions between cold Li atoms and Yb${}^{+}$ ions
• Radial two-dimensional ion crystals in a linear Paul trap
• Photon emission and absorption of a single ion coupled to an optical fiber-cavity
• Micromotion minimisation by synchronous detection of parametrically excited motion