scholarly journals AdS instability: resonant system for gravitational perturbations of AdS5 in the cohomogeneity-two biaxial Bianchi IX ansatz

2020 ◽  
Vol 2020 (6) ◽  
Author(s):  
Dominika Hunik-Kostyra ◽  
Andrzej Rostworowski
Keyword(s):  
Resonant System ◽  
Gravitational Perturbations ◽  
Bianchi Ix

scholarly journals Configuration of the Martian dust rings: shapes, densities, and size distributions from direct integrations of particle trajectories

2020 ◽  
Vol 500 (3) ◽  
pp. 2979-2985
Author(s):  
Xiaodong Liu ◽  
Jürgen Schmidt
Keyword(s):  
Size Range ◽  
Solar Radiation Pressure ◽  
Dust Particles ◽  
Size Distributions ◽  
Grain Sizes ◽  
Gravitational Perturbations ◽  
Ring Configuration ◽  
Upper Limits ◽  
Configuration Simulation ◽  
Fifth Order

ABSTRACT It is expected since the early 1970s that tenuous dust rings are formed by grains ejected from the Martian moons Phobos and Deimos by impacts of hypervelocity interplanetary projectiles. In this paper, we perform direct numerical integrations of a large number of dust particles originating from Phobos and Deimos. In the numerical simulations, the most relevant forces acting on the dust are included: Martian gravity with spherical harmonics up to fifth degree and fifth order, gravitational perturbations from the Sun, Phobos, and Deimos, solar radiation pressure, as well as the Poynting–Robertson drag. In order to obtain the ring configuration, simulation results of various grain sizes ranging from submicrometres to 100 μm are averaged over a specified initial mass distribution of ejecta. We find that for the Phobos ring grains smaller than about 2 μm are dominant; while the Deimos ring is dominated by dust in the size range of about 5–20 μm. The asymmetries, number densities, and geometric optical depths of the rings are quantified from simulations. The results are compared with the upper limits of the optical depth inferred from Hubble observations. We compare to previous work and discuss the uncertainties of the models.

scholarly journals A Plasmonic Refractive-Index Sensor Based Multiple Fano Resonance Multiplexing in Slot-Cavity Resonant System

2021 ◽  
Author(s):  
Zicong Guo ◽  
Kunhua Wen ◽  
Yuwen Qin ◽  
Yihong Fang ◽  
Zhengfeng Li ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Fdtd Method ◽  
Rectangular Cavity ◽  
Refractive Index Sensor ◽  
Right Wing ◽  
Left Wing ◽  
Resonant System ◽  
Coupled Mode ◽  
Metal Insulator Metal ◽  
The Right

AbstractIn this paper, a sub-wavelength metal-insulator-metal (MIM) waveguide structure is proposed by using a cross-shape rectangular cavity, of which wings are coupled with two rectangular cavities. Firstly, a cross-shape rectangular cavity is placed between the input and output MIM waveguides. According to the mutual interference between bright and dark modes, three Fano resonant peaks are generated. Secondly, by adding a rectangular cavity on the left wing of the cross shaped one, five asymmetric Fano resonance peaks are obtained. Thirdly, six asymmetric Fano resonance peaks are achieved after adding another cavity on the right wing. Finally, the finite-difference-time-domain (FDTD) method and multimode interference coupled-mode theory (MICMT) are used to simulate and analyze the coupled plasmonic resonant system, respectively. The highest sensitivity of 1 000nm/RIU is achieved.

scholarly journals Enhanced two-photon photoluminescence assisted by multi-resonant characteristics of a gold nanocylinder

Nanophotonics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 4009-4019
Author(s):  
Artur Movsesyan ◽  
Gwénaëlle Lamri ◽  
Sergei Kostcheev ◽  
Anke Horneber ◽  
Annika Bräuer ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Enhancement Factor ◽  
Second Harmonic ◽  
Plasmon Mode ◽  
Excitation Wavelength ◽  
Resonant System ◽  
Two Photon ◽  
Plasmon Resonances ◽  
Resonant Systems ◽  
Photoluminescence Enhancement

AbstractMulti-resonant plasmonic simple geometries like nanocylinders and nanorods are highly interesting for two-photon photoluminescence and second harmonic generation applications, due to their easy fabrication and reproducibility in comparison with complex multi-resonant systems like dimers or nanoclusters. We demonstrate experimentally that by using a simple gold nanocylinder we can achieve a double resonantly enhanced two-photon photoluminescence of quantum dots, by matching the excitation wavelength of the quantum dots with a dipolar plasmon mode, while the emission is coupled with a radiative quadrupolar mode. We establish a method to separate experimentally the enhancement factor at the excitation and at the emission wavelengths for this double resonant system. The sensitivity of the spectral positions of the dipolar and quadrupolar plasmon resonances to the ellipticity of the nanocylinders and its impact on the two-photon photoluminescence enhancement are discussed.

A descriptive model of thermoelectric transport in a resonant system of PbSe doped with Tl

2019 ◽  
Vol 7 (20) ◽  
pp. 12859-12868 ◽  
Author(s):  
Zhenyu Pan ◽  
Heng Wang
Keyword(s):  
Transport Properties ◽  
Transport Equations ◽  
Boltzmann Transport ◽  
Resonant System ◽  
Descriptive Model ◽  
Thermoelectric Transport

Transport properties in resonant system PbSe:Tl are now quantitatively explained with Boltzmann transport equations.

On the Influence of Noise on the Bianchi ix and viii Cosmological Models

1998 ◽  
Vol 9 (11) ◽  
pp. 1813-1825 ◽  
Author(s):  
John Argyris ◽  
Ioannis Andreadis ◽  
Corneliu Ciubotariu
Keyword(s):  
Cosmological Models ◽  
Bianchi Ix ◽  
Influence Of Noise
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