Kinetic Inductive Electromechanical Transduction for Nanoscale Force Sensing

• URL: http://arxiv.org/abs/2301.11055v4
• Date: Tue, 8 Aug 2023 18:11:53 GMT
• Title: Kinetic Inductive Electromechanical Transduction for Nanoscale Force Sensing
• Authors: August K. Roos, Ermes Scarano, Elisabet K. Arvidsson, Erik Holmgren, David B. Haviland
• Abstract summary: We use the principles of cavity optomechanics to design a resonant mechanical force sensor for atomic force microscopy. The sensor is based on a type of electromechanical coupling, dual to traditional capacitive coupling. We demonstrate phase-sensitive detection of cantilever motion using a multifrequency pumping and measurement scheme.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We use the principles of cavity optomechanics to design a resonant mechanical force sensor for atomic force microscopy. The sensor is based on a type of electromechanical coupling, dual to traditional capacitive coupling, whereby the motion of a cantilever induces surface strain that causes a change in the kinetic inductance of a superconducting nanowire. The cavity is realized by a compact microwave-plasma mode with an equivalent $LC$ circuit involving the kinetic inductance of the nanowire. The device is fully coplanar and we show how to transform the cavity impedance for optimal coupling to the transmission line and the following amplifier. For the device presented here, we estimate the bare kinetic inductive mechano-electric coupling (KIMEC) rate $g_0 / 2 \pi$ in the range 3-10 Hz. We demonstrate phase-sensitive detection of cantilever motion using a multifrequency pumping and measurement scheme.

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