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26 August 2020 Near-field microwave microscopy and processing of nanostructured materials
Wellington O. Avelino, Diego C. T. Lopez, Douglas A. A. Ohlberg, Brian Giraldo, Jesus A. Guerrero, Jhonattan C. Ramirez, Nobuhiko P. Kobayashi, Cássio G. Rego, Gilberto Medeiros-Ribeiro
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Proceedings Volume 11465, Low-Dimensional Materials and Devices 2020; 114650K (2020) https://doi.org/10.1117/12.2570708
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Here we present advances in the use of near field microwaves, in both high-resolution microwave microscopy of nanostructured materials, as well as on the processing of materials with high microwave power density in selected areas. For the former, we utilize a commercial Scanning Microwave Impedance Microscope (PrimeNano Inc.) and demonstrate 3nm feature size. We discuss the mechanisms for image contrast, as well as draw equivalent circuits for a variety of metallic, semiconductor and dielectric systems. For the latter, we built a homemade system that enabled the concentration of microwaves in areas smaller than 100um diameter. We report on the system performance, and demonstrate the use of the tool in monitoring materials changes as heating takes place, by measuring and analyzing the reflected microwave signal. In summary, we demonstrate the usage, limits and opportunities of harnessing microwave power in the near field to map and modify materials properties in small scales.
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Wellington O. Avelino, Diego C. T. Lopez, Douglas A. A. Ohlberg, Brian Giraldo, Jesus A. Guerrero, Jhonattan C. Ramirez, Nobuhiko P. Kobayashi, Cássio G. Rego, and Gilberto Medeiros-Ribeiro "Near-field microwave microscopy and processing of nanostructured materials", Proc. SPIE 11465, Low-Dimensional Materials and Devices 2020, 114650K (26 August 2020); https://doi.org/10.1117/12.2570708
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KEYWORDS
Microwave radiation
Microscopy
Near field
Nanostructuring
Microscopes
Near field scanning optical microscopy
Ceramics
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