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Park, Hyesung
Low-Dimensional Materials & Energy Conversion Lab
Research Interests
  • Nano materials, renewable energy, optoelectronic devices

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Motional Heating in a Graphene-Coated Ion Trap

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Title
Motional Heating in a Graphene-Coated Ion Trap
Author
Eltony, Amira M.Park, Hyesung G.Wang, Shannon X.Kong, JingChuang, Isaac L.
Issue Date
2014-10
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.14, no.10, pp.5712 - 5716
Abstract
Electric field noise originating from metal surfaces is a hindrance for a variety of microengineered systems, including for ions in microtraps, but is not well understood at the microscopic level. For trapped ions, it is manifested as motional-state decoherence inexplicable by thermal noise of electrodes alone, but likely surface-dependent. Here, we investigate the role of surface properties in motional heating by creating an ion trap with a unique exterior. Using single trapped-ion probes, we characterize copper electrodes covered in monolayer graphene, a material free of surface charge and dangling bonds. Surprisingly, we measure an average heating rate of 1020 +/- 30 quanta/s, which is similar to 100 times higher than typical for an uncoated trap operated under similar conditions. This may be related to hydrocarbon deposits on the surface, which could be monitored on graphene to potentially elucidate the mechanisms of motional heating on the atomic scale
URI
https://scholarworks.unist.ac.kr/handle/201301/11966
URL
http://pubs.acs.org/doi/abs/10.1021/nl502468g
DOI
10.1021/nl502468g
ISSN
1530-6984
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