Visualizing the bidirectional optical transfer function for near-field enhancement in waveguide coupled plasmonic transducers

In their article “Visualizing the bidirectional optical transfer function for near-field enhancement in waveguide coupled plasmonic transducers” Lauren M. Otto, D. Frank Ogletree, Shaul Aloni, Matteo Staffaroni, Barry C. Stipe and Aeron T. Hammack describe how visualizations of the near-field modes in the region of a plasmonic device were created using scattering scanning near-field optical microscopy and scanning electron microscopy cathodoluminescence with both showing a strong correspondence to multiphysical numerical modeling of the devices under interrogation.

The sSNOM measurements shown in this article were performed with NANOSENSORS™ AdvancedTEC™ ATEC-NC tip-view AFM probes.

Figure 3 from «Visualizing the bidirectional optical transfer function for near-field enhancement in waveguide coupled plasmonic transducers» by Lauren M. Otto et al.:
Scattering scanning near-field optical microscopy images of HAMR heads as a function of wavelength and polarization. Near-field maps for the 1ω0 and 6ω0 with both (a) 830 nm and (b) 633 nm wavelengths as well as polarizations ranging from −90° deg (perp, TE) to 0° (para TM) to +90° (perp, TE). All maps are 400 nm × 400 nm. The intensity maxima from all maps were extracted and plotted against the expected cos2(θ) intensity decay curve for both (c) 830 nm light and (d) 633 nm light. The full data set ranged from −100° to 100° in increments of 10° and covered six harmonics for both wavelengths. The AFM color scale ranges from −3.8 to +1.6 nm, and the map is 400 nm × 400 nm. Additional images can be found in the Supporting Information in the online version of the original article.

Lauren M. Otto, D. Frank Ogletree, Shaul Aloni, Matteo Staffaroni, Barry C. Stipe and Aeron T. Hammack
Visualizing the bidirectional optical transfer function for near-field enhancement in waveguide coupled plasmonic transducers
Nature Scientific Reports volume 8, Article number: 5761 (2018)
DOI: https://doi.org/10.1038/s41598-018-24061-3

Please follow this external link to read the full article: https://rdcu.be/bU4co

Open Access: The article “Visualizing the bidirectional optical transfer function for near-field enhancement in waveguide coupled plasmonic transducers” by Lauren M. Otto, D. Frank Ogletree, Shaul Aloni, Matteo Staffaroni, Barry C. Stipe and Aeron T. Hammack which is cited above is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

From Polymer to Magnetic Porous Carbon Spheres: Combined Microscopy, Spectroscopy, and Porosity Studies

In their research paper “From Polymer to Magnetic Porous Carbon Spheres: Combined Microscopy, Spectroscopy, and Porosity Studies” Federico Cesano, Sara Cravanzola, Valentina Brunella, Alessandro Damin and Domenica Scarano, after having first reported the preparation of polymer waste-derived microporous carbon microspheres (SBET ~800 m2/g) 100–300 μm in size, investigate the morphology, porous texture and the surface properties of carbon and of magnetic carbon microspheres by multiple techniques.*

The multi-technique methodology they used aims at an extensive description of the different characteristics of activated carbons with magnetic properties.

For the Atomic Force Microscopy described in this paper NANOSENSORS™ SSS-MFMR AFM probes for high resolution magnetic force imaging were used for the topography images as well as the MFM imaging.

Figure 7 from “From Polymer to Magnetic Porous Carbon Spheres: Combined Microscopy, Spectroscopy, and Porosity Studies” by F. Cesano et al:
Three images described from left to right of Fe3O4-based carbon microspheres: first image on the left (a) AFM topography, middle image (b) the related phase signal, and the image on the right (c) MFM phase shift images at H = 60 nm lift height obtained in a second scan. The phase shift range in (c) is ~ 0.6 m°.
Figure 7 from “From Polymer to Magnetic Porous Carbon Spheres: Combined Microscopy, Spectroscopy, and Porosity Studies” by F. Cesano et al:
Fe3O4-based carbon microspheres: (a) AFM topography, (b) the related phase signal, and (c) MFM phase shift images at H = 60 nm lift height obtained in a second scan. The phase shift range in (c) is ~ 0.6 m°. e description

*Federico Cesano, Sara Cravanzola, Valentina Brunella, Alessandro Damin and Domenica Scarano
From Polymer to Magnetic Porous Carbon Spheres: Combined Microscopy, Spectroscopy, and Porosity Studies
Frontiers in Materials 6:84 (2019)
DOI: https://doi.org/10.3389/fmats.2019.00084

Please follow this external link to read the full research article: https://www.frontiersin.org/articles/10.3389/fmats.2019.00084/full

Open Access: The article « From Polymer to Magnetic Porous Carbon Spheres: Combined Microscopy, Spectroscopy, and Porosity Studies” by Federico Cesano, Sara Cravanzola, Valentina Brunella, Alessandro Damin and Domenica Scarano which is cited above is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.