scholarly journals Gain-Assisted Optical Pulling Force on Plasmonic Graded Nano-Shell with Equivalent Medium Theory

Physics ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 955-968
Author(s):  
Yamin Wu ◽  
Yang Huang ◽  
Pujuan Ma ◽  
Lei Gao
Keyword(s):  
Optical Force ◽  
Core Shell ◽  
Deep Insight ◽  
Medium Theory ◽  
Additional Degree ◽  
The Core ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Pulling Force ◽  
Insight Into

The tunable optical pulling force on a graded plasmonic core-shell nanoparticle consisting of a gain dielectric core and graded plasmonic shell is investigated in the illumination of a plane wave. In this paper, the electrostatic polarizability and the equivalent permittivity of the core-shell sphere are derived and the plasmonic enhanced optical pulling force in the antibonding and bonding dipole modes of the graded nanoparticle are demonstrated. Additionally, the resonant pulling force occurring on the dipole mode is shown to be dependent on the aspect ratio of the core-shell particle, which is illustrated by the obtained equivalent permittivity. This shows that the gradation of the graded shell will influence the plasmonic feature of the particle, thus further shifting the resonant optical force peaks and strengthening the pulling force. The obtained results provide an additional degree of freedom to manipulate nanoparticles and give a deep insight into light–matter interaction.

Insight into the core–shell structures of Cu–In–S microspheres

2013 ◽  
Vol 26 ◽  
pp. 23-30 ◽  
Author(s):  
Angela S. Wochnik ◽  
Anna Frank ◽  
Christoph Heinzl ◽  
Jonas Häusler ◽  
Julian Schneider ◽  
...  
Keyword(s):  
Shell Structures ◽  
Core Shell ◽  
The Core ◽  
Insight Into

Nanoscale Core-Shell Hyperbolic Structure: A New Paradigm to Boost the Light-Matter Interaction

2019 ◽  
Author(s):  
Hung-I Lin ◽  
Kanchan Yadav ◽  
Kun-Ching Shen ◽  
Chun-Che Wang ◽  
Ting-Jia Chang ◽  
...  
Keyword(s):  
Core Shell ◽  
Hyperbolic Structure ◽  
New Paradigm ◽  
Matter Interaction ◽  
Light Matter Interaction

Insight into the Effect of the Core–Shell Microstructure on the Electrochemical Properties of Undoped 3D-Networked Conductive Diamond/Graphite

2019 ◽  
Vol 123 (10) ◽  
pp. 6018-6029 ◽  
Author(s):  
Zhaofeng Zhai ◽  
Nan Huang ◽  
Bing Yang ◽  
Chun Wang ◽  
Lusheng Liu ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Core Shell ◽  
Shell Microstructure ◽  
The Core ◽  
Insight Into

Insight into growth of Au–Pt bimetallic nanoparticles: anin situXAS study

2017 ◽  
Vol 24 (4) ◽  
pp. 825-835 ◽  
Author(s):  
Chandrani Nayak ◽  
D. Bhattacharyya ◽  
K. Bhattacharyya ◽  
A. K. Tripathi ◽  
R. D. Bapat ◽  
...  
Keyword(s):  
Bimetallic Nanoparticles ◽  
Energy Dispersive ◽  
Core Shell ◽  
One Pot ◽  
X Ray ◽  
The Core ◽  
One Pot Synthesis ◽  
X Ray Absorption ◽  
Insight Into

Au–Pt bimetallic nanoparticles have been synthesized through a one-pot synthesis route from their respective chloride precursors using block copolymer as a stabilizer. Growth of the nanoparticles has been studied by simultaneousin situmeasurement of X-ray absorption spectroscopy (XAS) and UV–Vis spectroscopy at the energy-dispersive EXAFS beamline (BL-08) at Indus-2 SRS at RRCAT, Indore, India.In situXAS spectra, comprising both X-ray near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS) parts, have been measured simultaneously at the Au and PtL3-edges. While the XANES spectra of the precursors provide real-time information on the reduction process, the EXAFS spectra reveal the structure of the clusters formed in the intermediate stages of growth. This insight into the formation process throws light on how the difference in the reduction potential of the two precursors could be used to obtain the core–shell-type configuration of a bimetallic alloy in a one-pot synthesis method. The core–shell-type structure of the nanoparticles has also been confirmed byex situenergy-dispersive spectroscopy line-scan and X-ray photoelectron spectroscopy measurements within situion etching on fully formed nanoparticles.

scholarly journals Photoluminescence enhancement with all-dielectric coherent metasurfaces

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yu-Tsung Lin ◽  
Amir Hassanfiroozi ◽  
Wei-Rou Jiang ◽  
Mei-Yi Liao ◽  
Wen-Jen Lee ◽  
...  
Keyword(s):  
Near Field ◽  
Photon Emission ◽  
Central Area ◽  
Optical Loss ◽  
Field Enhancement ◽  
Array Size ◽  
Additional Degree ◽  
Light Emitter ◽  
Matter Interaction ◽  
Light Matter Interaction

Abstract Mie resonances have recently attracted much attention in research on dielectric metasurfaces, owning to their enriched multipole resonances, negligible optical loss, and efficient light emitter integration. Although there is a rapid advancement in this field, some fundamental developments are still required to provide a simpler and more versatile paradigm for photoluminescence (PL) control. In this work, we proposed that an all-dielectric coherent metasurface can engineer the PL response by tuning the array size. Such PL manipulation is attributed to the collective Mie resonances that mediate the inter-unit interactions between unit elements and alter the PL intensity. Metasurfaces with different chip sizes are utilized to explore the array size effect on the collective Mie resonances, field enhancement, and Q-factor in TiO2 metasurfaces. Incorporating the all-dielectric coherent metasurface with fluorescent photon emitters, we performed the dependence of PL enhancement on array size, which achieves an enhancement factor of ∼10 at the central area of a 90 × 90 μm2 TiO2 metasurface array. These findings provide an additional degree of freedom to engineer the near-field confinement and enhancement, allowing one to manipulate incoherent photon emission and tune light–matter interaction at the nanoscale.

scholarly journals Lower excitons strong light matter interaction in plasmonic tweezers

2020 ◽  
Author(s):  
Yunfei Zou ◽  
Gang Song ◽  
Naien Wang ◽  
Li Yu
Keyword(s):  
Optical Force ◽  
Ambient Conditions ◽  
Strong Light ◽  
Maxwell Stress Tensor ◽  
Coupling System ◽  
Matter Interaction ◽  
Coupling Force ◽  
Light Matter Interaction ◽  
J Aggregates ◽  
Trapping Performance

Abstract Plasmonic nanocavity has been an excellent platform to study light matter interaction under ambient conditions and within sub-diffraction volumes. However, controlled strong light matter interaction in the plasmonic system has rarely been reported. Here, we design a plasmonic tweezers, which can trap a molecular J-aggregates, and be a plasmonic cavity to investigate the strong light matter interaction. We use finite-difference time-domain methods and Maxwell stress tensor to evaluate the optical response and the trapping performance. With the help of coupled oscillator model and virtual excitons theory, we analyze the strong coupling progress in lower excitons system, we further introduce a `coupling force' parameter to characterize the relationship between the optical force and model volume in the coupling system. The proposed method offers a way to locate a molecular J-aggregates in a plasmonic tweezers for investigating optical force performance and strong light matter interaction.

Ultrafast light matter interaction in CdSe/ZnS core-shell quantum dots

2018 ◽  
Author(s):  
Rajesh Kumar Yadav ◽  
Rituraj Sharma ◽  
Anirban Mondal ◽  
K. V. Adarsh
Keyword(s):  
Quantum Dots ◽  
Core Shell ◽  
Matter Interaction ◽  
Light Matter Interaction

scholarly journals Core Criminal Law Provisions in the United Nations Convention Against Corruption

2009 ◽  
Vol 9 (1) ◽  
pp. 139-155
Author(s):  
Michael Kubiciel
Keyword(s):  
Law Enforcement ◽  
United Nations ◽  
Criminal Law ◽  
Deep Insight ◽  
Public Officials ◽  
Legal Development ◽  
The Core ◽  
United Nations Convention ◽  
International Conventions ◽  
Insight Into

AbstractWith the adoption of the UNCAC in 2003, the international legal development in the fight against corruption has reached its peak. Now the convention has to be filled with life. This is the task of national law-makers, law enforcement bodies and courts. They all need substantial information concerning the content of the convention's articles. Unfortunately, an offical or semi-official commentary to the UNCAC does not exist. This study aims at filling that gap by providing substanial information for the core criminal law provisions “bribery of public offical” and “active bribery of foreign public officials”. To this end, the study reveals cross-relations between the UNCAC and international conventions whose articles have been used as examples for the legal design of the UNCAC. Since several of the preceding conventions are accompanied by official commentaries or explanatory reports, these documents also offer a deep insight into the UNCAC.

Thousands of human sequences provide deep insight into single genomes

Nature ◽  
2020 ◽  
Vol 581 (7809) ◽  
pp. 385-386
Author(s):  
Deanna M. Church
Keyword(s):  
Deep Insight ◽  
Insight Into
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