Spatial Correlation between Fluctuating and Static Fields over Metal and Dielectric Substrates
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Date
2021-11-19
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Journal Article
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Abstract
We report spatially resolved measurements of static and fluctuating electric fields over conductive (Au) and nonconductive (SiO2) surfaces. Using an ultrasensitive "nanoladder"cantilever probe to scan over these surfaces at distances of a few tens of nanometers, we record changes in the probe resonance frequency and damping that we associate with static and fluctuating fields, respectively. We find static and fluctuating fields to be spatially correlated. Furthermore, the fields are of similar magnitude for the two materials. We quantitatively describe the observed effects on the basis of trapped surface charges and dielectric fluctuations in an adsorbate layer. Our results are consistent with organic adsorbates significantly contributing to surface dissipation that affects nanomechanical sensors, trapped ions, superconducting resonators, and color centers in diamond.
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published
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Volume
127 (21)
Pages / Article No.
216101
Publisher
American Physical Society
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Organisational unit
03906 - Degen, Christian / Degen, Christian
02205 - FIRST-Lab / FIRST Center for Micro- and Nanoscience
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Funding
177198 - Zeptonewton force sensing on a membrane resonator platform (SNF)
ETH-03 16-1 - Attempt at the mechanical detection of a single nuclear spin (ETHZ)
ETH-03 16-1 - Attempt at the mechanical detection of a single nuclear spin (ETHZ)