Integrated fiber-mirror ion trap for strong ion-cavity coupling

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dc.identifier.uri Brandstätter, B. McClung, A. Schüppert, K. Casabone, B. Friebe, K. Stute, A. Schmidt, Piet O. Deutsch, C. Reichel, J. Blatt, R. Northup, T.E. 2018-04-11T10:45:19Z 2018-04-11T10:45:19Z 2013
dc.identifier.citation Brandstätter, B.; McClung, A.; Schüppert, K.; Casabone, B.; Friebe, K. et al.: Integrated fiber-mirror ion trap for strong ion-cavity coupling. In: Review of Scientific Instruments 84 (2013), Nr. 12, 123104. DOI:
dc.description.abstract We present and characterize fiber mirrors and a miniaturized ion-trap design developed to integrate a fiber-based Fabry-Perot cavity (FFPC) with a linear Paul trap for use in cavity-QED experiments with trapped ions. Our fiber-mirror fabrication process not only enables the construction of FFPCs with small mode volumes, but also allows us to minimize the influence of the dielectric fiber mirrors on the trapped-ion pseudopotential. We discuss the effect of clipping losses for long FFPCs and the effect of angular and lateral displacements on the coupling efficiencies between cavity and fiber. Optical profilometry allows us to determine the radii of curvature and ellipticities of the fiber mirrors. From finesse measurements, we infer a single-atom cooperativity of up to 12 for FFPCs longer than 200 μm in length; comparison to cavities constructed with reference substrate mirrors produced in the same coating run indicates that our FFPCs have similar scattering losses. We characterize the birefringence of our fiber mirrors, finding that careful fiber-mirror selection enables us to construct FFPCs with degenerate polarization modes. As FFPCs are novel devices, we describe procedures developed for handling, aligning, and cleaning them. We discuss experiments to anneal fiber mirrors and explore the influence of the atmosphere under which annealing occurs on coating losses, finding that annealing under vacuum increases the losses for our reference substrate mirrors. X-ray photoelectron spectroscopy measurements indicate that these losses may be attributable to oxygen depletion in the mirror coating. Special design considerations enable us to introduce a FFPC into a trapped ion setup. Our unique linear Paul trap design provides clearance for such a cavity and is miniaturized to shield trapped ions from the dielectric fiber mirrors. We numerically calculate the trap potential in the absence of fibers. In the experiment additional electrodes can be used to compensate distortions of the potential due to the fibers. Home-built fiber feedthroughs connect the FFPC to external optics, and an integrated nanopositioning system affords the possibility of retracting or realigning the cavity without breaking vacuum. © 2013 © 2013 Author(s). eng
dc.language.iso eng
dc.publisher College Park, MD : American Institute of Physics
dc.relation.ispartofseries Review of Scientific Instruments 84 (2013), Nr. 12
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
dc.subject Coupling efficiency eng
dc.subject Design considerations eng
dc.subject Fabrication process eng
dc.subject Fabry-Perot cavity eng
dc.subject Lateral displacements eng
dc.subject Nanopositioning systems eng
dc.subject Optical profilometry eng
dc.subject Radii of curvature eng
dc.subject Coatings eng
dc.subject Experiments eng
dc.subject Ions eng
dc.subject Mirrors eng
dc.subject Photoelectrons eng
dc.subject Trapped ions eng
dc.subject Vacuum eng
dc.subject X ray photoelectron spectroscopy eng
dc.subject Fibers eng
dc.subject.classification Konferenzschrift ger
dc.subject.ddc 530 | Physik ger
dc.title Integrated fiber-mirror ion trap for strong ion-cavity coupling
dc.type Article
dc.type Text
dc.relation.issn 00346748
dc.bibliographicCitation.issue 12
dc.bibliographicCitation.volume 84
dc.bibliographicCitation.firstPage 123104
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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