Plasmon resonances and electron phase shifts near Au nanospheres

Petersen, Timothy; Bosman, Michel; Keast, V. J.; Anstis, G. R.

doi:10.1063/1.2980505

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…This paper also reports the use of multiple image planes to obtain a better estimate of the longitudinal derivative. The same group [312] also used the transport of intensity equation to image the structure of MgO nano-cubes and also measure the mean inner potential of the cubes, and went on to use the transport of intensity equation to image phase shifts [313] that they attributed to surface plasmon excitation. This paper suggested that the phase retrieval techniques offer a new approach to the observation of such structures.…”

Section: Figure 20: Experimental Underfocused (A) and Overfocused Ele...mentioning

confidence: 99%

Coherent methods in the X-ray sciences

Nugent

2010

Advances in Physics

455

340

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X-ray sources are developing rapidly and their coherent output is growing extremely rapidly. The increased coherent flux from modern X-ray sources is being matched with an associated rapid development in experimental methods. This article reviews the literature describing the ideas that utilise the increased brilliance from modern Xray sources. It explores how ideas in coherent X-ray science are leading to developments in other areas, and vice versa. The article describes measurements of coherence properties and uses this discussion as a base from which to describe partially-coherent diffraction and X-ray phase contrast imaging, with its applications in materials science, engineering and medicine. Coherent diffraction imaging methods are reviewed along with associated experiments in materials science. Proposals for experiments to be performed with the new X-ray free-electron-lasers are briefly discussed. The literature on X-ray photon correlation spectroscopy is described and the features it has in common with other coherent X-ray methods are identified. Many of the ideas used in the coherent X-ray literature have their origins in the optical and electron communities and these connections are explored. A review of the areas in which ideas from coherent X-ray methods are contributing to methods for the neutron, electron and optical communities is presented.

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Section: Figure 20: Experimental Underfocused (A) and Overfocused Ele...mentioning

confidence: 99%

Coherent methods in the X-ray sciences

Nugent

2010

Advances in Physics

455

340

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“…Some novel ideas have been proposed on the detection side of SPP imaging. For instance, electron phase retrieval maps have been suggested in holographic electron microscopy, 94 and the direct electrical detection of SPPs [95][96][97] promises to be highly efficient, though not yet readily applicable to imaging. Even more advances have been made in recent years on the excitation side.…”

Section: Discussionmentioning

confidence: 99%

Real-space imaging of nanoplasmonic resonances

Vogelgesang

Dmitriev

2010

Analyst

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Resonant nanoplasmonic structures have long been recognized for their unique applications in subwavelength control of light for enhanced transmission, focussing, field confinement, decay rate management, etc. Increasingly, they are also integrated in electro-optical analytical sensors, shrinking the active volume while at the same time improving sensitivity and specificity. The microscopic imaging of resonances in such structures and also their dynamic variations has seen dramatic advances in recent years. In this Minireview we outline the current status of this rapidly evolving field, discussing both optical and electron microscopy approaches, the limiting issues in spatial resolution and data interpretation, the quantities that can be recorded, as well as the growing importance of time-resolving methods.

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“…The TIE does not require any special microscope attachments or a vacuum region, and is thus considered to have a wider scope for applications compared to EH. The TIE has been used to determine the mean inner potential (MIP) of metallic nanoparticles [14][15][16], and it was found that the MIP increases as the particle diameter decreases to a few nanometers. Petersen et al…”

Section: / 24mentioning

confidence: 99%

Practical procedure for retrieval of quantitative phase map for two-phase interface using the transport of intensity equation

Zhang

Oshima

2015

Ultramicroscopy

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A practical procedure for retrieving quantitative phase distribution at the interface between a thin amorphous germanium (a-Ge) film and vacuum based on the transport of intensity equation is proposed. First, small regions were selected in transmission electron microscopy (TEM) images with three different focus settings in order to avoid phase modulation due to low frequency noise. Second, the selected TEM image and its three reflected images were combined for mirror-symmetry to meet the boundary requirements. However, in this symmetrization, extra phase modulation arose due to the discontinuous nature of Fresnel fringes at the boundaries among the four parts of the combined image. Third, a corrected phase map was obtained by subtracting a linear fit to the extra phase modulation. The phase shift for a thin a-Ge film was determined to be approximately 0.5 rad, indicating that the average inner potential was 18.3 V. The validity of the present phase retrieval is discussed using simple simulations.

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Plasmon resonances and electron phase shifts near Au nanospheres

Cited by 8 publications

References 21 publications

Coherent methods in the X-ray sciences

Coherent methods in the X-ray sciences

Real-space imaging of nanoplasmonic resonances

Practical procedure for retrieval of quantitative phase map for two-phase interface using the transport of intensity equation

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