Coherent Multiphoton Photoelectron Emission from Single Au Nanorods: The Critical Role of Plasmonic Electric Near-Field Enhancement

ACS Nano ◽  
2012 ◽  
Vol 7 (1) ◽  
pp. 87-99 ◽  
Author(s):  
Andrej Grubisic ◽  
Volker Schweikhard ◽  
Thomas A. Baker ◽  
David J. Nesbitt
Keyword(s):  
Near Field ◽  
Critical Role ◽  
Field Enhancement ◽  
Photoelectron Emission ◽  
Au Nanorods

The critical role of headcap and plasmonic near-field enhancement in mushroom-shaped Au nanorod

2014 ◽  
Vol 616-617 ◽  
pp. 98-103 ◽  
Author(s):  
Xi-bin Xu ◽  
Jiang-shan Luo ◽  
Miao Liu ◽  
Yu-ying Wang ◽  
Zao Yi ◽  
...  
Keyword(s):  
Near Field ◽  
Critical Role ◽  
Field Enhancement

scholarly journals Role of near-field enhancement in plasmonic laser nanoablation using gold nanorods on a silicon substrate: comment

2011 ◽  
Vol 19 (7) ◽  
pp. 6177 ◽  
Author(s):  
E. Boulais ◽  
A. Robitaille ◽  
P. Desjeans-Gauthier ◽  
M. Meunier
Keyword(s):  
Gold Nanorods ◽  
Silicon Substrate ◽  
Near Field ◽  
Field Enhancement

scholarly journals Near-field surface plasmon field enhancement induced by rippled surfaces

2017 ◽  
Vol 8 ◽  
pp. 956-967 ◽  
Author(s):  
Mario D’Acunto ◽  
Francesco Fuso ◽  
Ruggero Micheletto ◽  
Makoto Naruse ◽  
Francesco Tantussi ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Near Field ◽  
Field Enhancement ◽  
General Technique ◽  
Electric Field Polarization ◽  
Surface Patterns ◽  
Trial And Error Method ◽  
Plasmon Polaritons ◽  
Error Method

The occurrence of plasmon resonances on metallic nanometer-scale structures is an intrinsically nanoscale phenomenon, given that the two resonance conditions (i.e., negative dielectric permittivity and large free-space wavelength in comparison with system dimensions) are realized at the same time on the nanoscale. Resonances on surface metallic nanostructures are often experimentally found by probing the structures under investigation with radiation of various frequencies following a trial-and-error method. A general technique for the tuning of these resonances is highly desirable. In this paper we address the issue of the role of local surface patterns in the tuning of these resonances as a function of wavelength and electric field polarization. The effect of nanoscale roughness on the surface plasmon polaritons of randomly patterned gold films is numerically investigated. The field enhancement and relation to specific roughness patterns is analyzed, producing many different realizations of rippled surfaces. We demonstrate that irregular patterns act as metal–dielectric–metal local nanogaps (cavities) for the resonant plasmonic field. In turn, the numerical results are compared to experimental data obtained via aperture scanning near-field optical microscopy.

scholarly journals The role of morphology and coupling of gold nanoparticles in optical breakdown during picosecond pulse exposures

2016 ◽  
Vol 7 ◽  
pp. 869-880 ◽  
Author(s):  
Yevgeniy R Davletshin ◽  
J Carl Kumaradas
Keyword(s):  
Gold Nanoparticles ◽  
Laser Pulse ◽  
Near Field ◽  
Optical Breakdown ◽  
Field Enhancement ◽  
The Finite Element Method ◽  
Breakdown Threshold ◽  
Plasma Dynamics ◽  
The One

This paper presents a theoretical study of the interaction of a 6 ps laser pulse with uncoupled and plasmon-coupled gold nanoparticles. We show how the one-dimensional assembly of particles affects the optical breakdown threshold of its surroundings. For this purpose we used a fully coupled electromagnetic, thermodynamic and plasma dynamics model for a laser pulse interaction with gold nanospheres, nanorods and assemblies, which was solved using the finite element method. The thresholds of optical breakdown for off- and on-resonance irradiated gold nanosphere monomers were compared against nanosphere dimers, trimers, and gold nanorods with the same overall size and aspect ratio. The optical breakdown thresholds had a stronger dependence on the optical near-field enhancement than on the mass or absorption cross-section of the nanostructure. These findings can be used to advance the nanoparticle-based nanoscale manipulation of matter.

scholarly journals High-Resolution Measurement of Molecular Internal Polarization Structure by Photoinduced Force Microscopy

2021 ◽  
Vol 11 (15) ◽  
pp. 6937
Author(s):  
Hidemasa Yamane ◽  
Nobuhiko Yokoshi ◽  
Hajime Ishihara
Keyword(s):  
High Resolution ◽  
Single Molecule ◽  
Near Field ◽  
Critical Role ◽  
Single Molecules ◽  
Atomic Scale ◽  
Metallic Surface ◽  
Metallic Surfaces ◽  
Force Microscopy

Near-field interactions between metallic surfaces and single molecules play an essential role in the application of metamaterials. To reveal the near-field around a photo-irradiated single molecule on the metallic surface, high-resolution photo-assisted scanning microscopy is required. In this study, we theoretically propose photoinduced force microscopy (PiFM) measurements of single molecules at the atomic resolution. For experimental demonstration, we performed a numerical calculation of PiFM images of various transition states, including optical forbidden transitions, and interpreted them in terms of the interaction between the molecular internal polarization structures and localized plasmon. We also clarified the critical role of atomic-scale structures on the tip surface for high-resolution PiFM measurements.

The Role of the SLP in Autism Spectrum Disorder Screening and Assessment

2008 ◽  
Vol 15 (2) ◽  
pp. 50-59 ◽  
Author(s):  
Amy Philofsky
Keyword(s):  
Language Development ◽  
Critical Role ◽  
Children With Autism ◽  
Autism Spectrum ◽  
Children With Asd ◽  
Prevalence Estimates ◽  
Notable Increase ◽  
Screening Assessment ◽  
Critical Components

AbstractRecent prevalence estimates for autism have been alarming as a function of the notable increase. Speech-language pathologists play a critical role in screening, assessment and intervention for children with autism. This article reviews signs that may be indicative of autism at different stages of language development, and discusses the importance of several psychometric properties—sensitivity and specificity—in utilizing screening measures for children with autism. Critical components of assessment for children with autism are reviewed. This article concludes with examples of intervention targets for children with ASD at various levels of language development.

A critical role of iNOS-derived Nitric Oxide (NO) and progesterone in implantation

1998 ◽  
Vol 5 (1) ◽  
pp. 115A-115A
Author(s):  
K CHWALISZ ◽  
E WINTERHAGER ◽  
T THIENEL ◽  
R GARFIELD
Keyword(s):  
Nitric Oxide ◽  
Critical Role
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