Trapped-ion probing of light-induced charging effects on dielectrics

By M. Harlander, M. Brownnutt, W. Hansel, Rainer Blatt. 2010

150 citations recorded by the source corpus.

We use a string of confined 40Ca+ ions to measure perturbations to a trapping potential which are caused by the light-induced charging of an antireflection-coated window and of insulating patches on the ion-trap electrodes. The electric fields induced at the ions' position are characterized as a function of distance to the dielectric and as a function of the incident optical power and wavelength. The measurement of the ion-string position is sensitive to as few as 40 elementary charges per on the dielectric at distances of the order of millimetres, and perturbations are observed for illuminations with light of wavelengths as large as 729 nm. This has important implications for the future of miniaturized ion-trap experiments, notably with regard to the choice of electrode material and the optics that must be integrated in the vicinity of the ion. The method presented here can be readily applied to the investigation of charging effects beyond the context of ion-trap experiments.

Subfields: Atomic and Molecular Physics, and Optics, Bioengineering, Statistics and Probability

View Paper: https://www.semanticscholar.org/paper/ca875db462afb8c8d2ff5569658a7f369ca46ba5

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Materials challenges and opportunities for quantum computing hardware (2021, background): “Suchdrifts have been observed in response to visible and ultraviolet light scattering off trap surfaces (308) and have been attributed to photoelectrons deposited on dielectrics (309).”
Ion-trap measurements of electric-field noise near surfaces (2014, methodology): “It has been proposed that this could be achieved by using an ion trap with an open geometry and varying the distance between it and some external object (Maiwald et al., 2009; Harlander et al., 2010; Brownnutt et al., 58 2012).”
Cold hybrid ion-atom systems (2017, unknown): “(Harlander et al., 2010; Härter et al., 2014)”