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18 February 2011 Near-field microwave phase imaging by a spintronic sensor
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Proceedings Volume 7995, Seventh International Conference on Thin Film Physics and Applications; 79951X (2011) https://doi.org/10.1117/12.888266
Event: Seventh International Conference on Thin Film Physics and Applications, 2010, Shanghai, China
Abstract
We report a novel technique for microwave imaging utilizing a nonlinear coupling between the microwave fields in a ferromagnetic material, in which the relative phase of the coupled microwave fields plays an important role in the resultant homodyne dc voltage. A technical breakthrough has been achieved to effectively control such a relative phase using a spintronic Michelson interferometry. This enables a phase- and amplitude-resolved near-field dielectric image using a spintronic sensor. The contrast of microwave imaging for an object with subwavelength features strongly depends on the local dielectric constant of materials, and agrees well with simulation results by COMSOL.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
XiaoFeng Zhu, M. Harder, A. Wirthmann, Bo Zhang, W. Lu, Y. S. Gui, and C.-M. Hu "Near-field microwave phase imaging by a spintronic sensor", Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 79951X (18 February 2011); https://doi.org/10.1117/12.888266
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