Microanalysis by Means of Electrons

Hillier, James; Baker, Richard F.

doi:10.1063/1.1707491

Cited by 148 publications

(37 citation statements)

References 12 publications

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“…Two near-field imaging techniques have recently emerged. The first technique is the Electron Energy Loss Spectroscopy (EELS) [106] that enables direct mapping of the spatial distribution of all optical resonances of any structure, including plasmonic [107,108] or dielectric-based nanostructures (see [43] for a comprehensive review and additional references). Because electrons enter the near-field of a nanostructure, EELS can be used for mapping either bright or dark resonances.…”

Section: Imaging Of Fano-resonant Metamolecules In the Near Fieldmentioning

confidence: 99%

Fano-resonant metamaterials and their applications

Khanikaev¹,

Wu²,

2013

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New developments in the field of Fano-resonant plasmonic metamaterials are reviewed. The emphasis is on the applications of such artificial electromagnetic materials to a variety of technologically important areas: solar energy harvesting and conversion, sensing/identification of ultra-small molecular contents, and extreme molding of the flow of light. Most recent theoretical tools for describing Fano-resonant metamaterials are reviewed. Both fully three-dimensional metamaterials and planar meta-surfaces are discussed, and their future prospects for applications are critically evaluated.

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Section: Imaging Of Fano-resonant Metamolecules In the Near Fieldmentioning

confidence: 99%

Fano-resonant metamaterials and their applications

Khanikaev¹,

Wu²,

2013

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“…In the scanning approach originating from the work of Hillier and Baker [1] and developed by Crewe and co-workers [2], the sample is illuminated by a small probe, and an energy-loss spectrum is formed using a relatively simple spectrometer. The probe is scanned across the sample, and an energy-filtered image is obtained by capturing the variation of the spectrum intensity as a function of the probe position on the specimen.…”

mentioning

confidence: 99%

Design and first applications of a post-column imaging filter

Krivanek¹,

Gubbens²,

Dellby³

et al. 1992

Microsc. Microanal. Microstruct.

144

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Abstract. 2014 We have designed and built an imaging filter which can be attached to most standard TEMs, and is capable of operating at primary energies of up to 400 keV. The filter uses a 90°m agnetic sector prism, a piezoelectrically controlled energy-selecting slit, and 6 quadrupole and 5 sextupole lenses. It fully corrects second-order aberrations and distortions in images formed with electrons of selected energies, and it also produces second-order aberration-corrected spectra of variable dispersion. We show the first applications of the filter at 200 keV primary energy, which indicate that the filter will excel in chemical mapping and spectroscopy, in improving contrast of electron images and diffraction patterns, and in making high resolution electron microscopy and diffraction more quantitative. We conclude the paper with a discussion about atomic resolution image formation using inelastically scattered electrons, and the relationship between energy-filtered diffraction patterns and images formed with electrons of the same energy.

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“…Since the first demonstration by Hillier and Baker [92], EELS has become standard in electron microscopy, in both TEM and SEM. EELS detects material properties by engaging electron beams with the sample, and recording the energy loss spectra of the incident beams.…”

Section: Electron Energy Loss Spectroscopymentioning

confidence: 99%

Optical and electrical mappings of surface plasmon cavity modes

et al. 2014

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Plasmonics is a rapidly expanding field, founded in physics but now with a growing number of applications in biology (biosensing), nanophotonics, photovoltaics, optical engineering and advanced information technology. Appearing as charge density oscillations along a metal surface, excited by electromagnetic radiation (e.g., light), plasmons can propagate as surface plasmon polaritons, or can be confined as standing waves along an appropriately-prepared surface. Here, we review the latter manifestation, both their origins and the manners in which they are detected, the latter dominated by near field scanning optical microscopy (NSOM/SNOM). We include discussion of the "plasmonic halo" effect recently observed by the authors, wherein cavity-confined plasmons are able to modulate optical transmission through step-gap nanostructures, yielding a novel form of color (wavelength) selection.

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Microanalysis by Means of Electrons

Cited by 148 publications

References 12 publications

Fano-resonant metamaterials and their applications

Fano-resonant metamaterials and their applications

Design and first applications of a post-column imaging filter

Optical and electrical mappings of surface plasmon cavity modes

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