scholarly journals A Nonreciprocal Angular Selective Absorber with the Special Multilayer Structure

2021 ◽  
Author(s):  
Baofei Wan ◽  
Yu Ma ◽  
Ziwei Zhou ◽  
Dan Zhang ◽  
Hai-Feng Zhang
Keyword(s):  
Optical Communications ◽  
Indium Tin Oxide ◽  
Plasma Frequency ◽  
Impedance Matching ◽  
Large Angle ◽  
Absorption Function ◽  
One Dimensional ◽  
Ito Film ◽  
Proportional Relationship ◽  
The One

Abstract Due to the orderly design of the special anti-reflection structure and the absorption structure, the one-dimensional layered periodic structure has a good impedance matching in a certain frequency band and a large-angle range, providing for the realization of an angular selective absorber (ASA) with a high rectangle coefficient. For the sake of obtaining excellent absorptivity, the indium tin oxide (ITO) film is used, and it also acts as a function of tuning the absorption angle range (AAR) of the ASA by adjusting the plasma frequency. The proportional relationship between the thickness of the dielectric layers is also discussed to satisfy a good absorption function. At the same time, the ASA also possesses productive nonreciprocal performance (NP) and can also be controlled by the plasma frequency. The transfer matrix method is used for numerical simulation. Our special tunable ASA with the NP is relatively rare in previous studies, which can be applied to optical communications and military fields. Furthermore, we hope that the design we proposed can provide new possibilities for the development of the ASAs.

Effect of Metal Intercalating on Transmission Characteristics of One-Dimensional Photonic Crystal

2011 ◽  
Vol 418-420 ◽  
pp. 679-683
Author(s):  
Bei Jia He ◽  
Xin Yi Chen ◽  
Jian Bo Wang ◽  
Jun Lu ◽  
Jian Chang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Plasma Frequency ◽  
Fdtd Method ◽  
Transmission Characteristics ◽  
Material Characteristic ◽  
One Dimensional ◽  
Dimensional Photonic Crystal ◽  
Simulation Results ◽  
The One ◽  
Difference Time

To expand the bandgap's width of the one-dimensional photonic crystal, a crystal named SiO2/Metal/MgF2 is formed by joining some metals into the crystal SiO2/MgF2. Furthermore the Finite Difference Time Domain (FDTD) method is used to explore the metals' influence on the crystal's transmission characteristics. The simulation results show that the metals joined could expand the width of the one-dimensional photonic crystal's bandgap effectively and the bandgap's width increases when the metals' thickness increases. Meanwhile the bandgap's characteristic is affected by the metals' material-characteristic. The higher the plasma frequency is, the wider the bandgap's width will be and the more the number of the bandgaps will be. On the other hand, the metals' damping frequency has no significant effect on the bandgap, but would make the bandgap-edge's transmittance decrease slightly.

scholarly journals One-Dimensional Propagation

2020 ◽  
pp. 453-512
Author(s):  
Steven L. Garrett
Keyword(s):  
Sound Propagation ◽  
Impedance Matching ◽  
Low Frequency ◽  
Absolute Calibration ◽  
Sound Waves ◽  
Quality Factors ◽  
Electrical Measurements ◽  
One Dimensional ◽  
The One ◽  
The Waves

Abstract Having already invested in understanding both the equation of state and the hydrodynamic equations, only straightforward algebraic manipulations will be required to derive the wave equation, justify its solutions, calculate the speed of sound in fluids, and derive the expressions for acoustic intensity and the acoustic kinetic and potential energy densities of sound waves. The “machinery” developed to describe waves on strings will be sufficient to describe one-dimensional sound propagation in fluids, even though the waves on the string were transverse and the one-dimensional waves in fluids are longitudinal. These results are combined with the thermal and viscous penetration depths to calculate the frequencies and quality factors in standing wave resonators. The coupling of those resonators to loudspeakers will be examined. The introduction of reciprocal transducers that are linear, passive, and reversible will allow absolute calibration of transducers using only electrical measurements (i.e., currents and voltages) by the reciprocity method, if the acoustic impedance that couples the source and receiver is calculable. Reflection and transmission at junctions between multiple ducts and other networks will be calculated and applied to the design of filters. The behavior of waves propagating through horns will provide useful impedance matching but introduce a low-frequency cut-off.

scholarly journals A new line on the wide binary test of gravity

2019 ◽  
Vol 487 (4) ◽  
pp. 5291-5303 ◽  
Author(s):  
Indranil Banik
Keyword(s):  
Large Angle ◽  
Outlier Rejection ◽  
Wide Binary ◽  
One Dimensional ◽  
Modified Newtonian Dynamics ◽  
Newtonian Dynamics ◽  
Moving Groups ◽  
Law Of Gravity ◽  
The One ◽  
Larger Sample

ABSTRACT The relative velocity distribution of wide binary (WB) stars is sensitive to the law of gravity at the low accelerations typical of galactic outskirts. I consider the feasibility of this wide binary test using the ‘line velocity’ method. This involves considering only the velocity components along the direction within the sky plane orthogonal to the systemic proper motion of each WB. I apply this technique to the WB sample of Hernandez et al., carefully accounting for large-angle effects at one order beyond leading. Based on Monte Carlo trials, the uncertainty in the one-dimensional velocity dispersion is ≈100 m s−1 when using sky-projected relative velocities. Using line velocities reduces this to ≈30 m s−1 because these are much less affected by distance uncertainties. My analysis does not support the Hernandez et al. claim of a clear departure from Newtonian dynamics beyond a radius of ≈10 kAU, partly because I use 2σ outlier rejection to clean their sample first. None the less, the uncertainties are small enough that existing WB data are nearly sufficient to distinguish Newtonian dynamics from Modified Newtonian Dynamics. I estimate that ≈1000 WB systems will be required for this purpose if using only line velocities. In addition to a larger sample, it will also be important to control for systematics like undetected companions and moving groups. This could be done statistically. The contamination can be minimized by considering a narrow theoretically motivated range of parameters and focusing on how different theories predict different proportions of WBs in this region.

Fabrication Research and Property of Double Cold Cathode for the Field Emission Display Panel

2011 ◽  
Vol 186 ◽  
pp. 75-78
Author(s):  
Qiang Guo ◽  
Yu Kui Li
Keyword(s):  
Field Emission ◽  
Indium Tin Oxide ◽  
Cold Cathode ◽  
Field Emission Display ◽  
Ito Film ◽  
Screen Printing Technique ◽  
Printing Technique ◽  
Cathode Structure ◽  
The One ◽  
Photolithography Process

With the precise photolithography process and simple screen-printing technique, the double cold cathode structure was fabricated on the cathode plate. The indium tin oxide (ITO) film coated over the cathode plate surface was etched to form bar ITO stripes, which was used as the cathode electrode. The one ITO group was composed of two parallel bar ITO stripes, on which the screen-printed carbon nanotube paste was employed to form the field emitter. The covering layer was also fabricated by the solidified insulation slurry with the pre-determined patterns. The phosphor prepared on the anode plate was utilized to form the panel image. The sealed field emission display panel with double cold cathode structure showed high panel luminous brightness, better field emission characteristics and good emission uniformity.

Discrete soliton diode induced by synthetic gauge phase

2017 ◽  
Vol 26 (01) ◽  
pp. 1750012 ◽  
Author(s):  
Hongxin Huang ◽  
Xiaofeng Zhu ◽  
Shijie Su ◽  
Huangwu Li ◽  
Chunqing Huang ◽  
...  
Keyword(s):  
Optical Communications ◽  
Initial Phase ◽  
High Speed ◽  
Coupling Constant ◽  
Discrete Soliton ◽  
One Dimensional ◽  
Waveguide Arrays ◽  
All Optical ◽  
The One ◽  
Discrete Solitons

We demonstrate the nonreciprocal dynamics of discrete solitons (DSs) induced by a uniform synthetic gauge phase (SGP) in one-dimensional waveguide array. The SGP is embedded into the coupling constant between the waveguides, which provides a directional momentum to the propagating fields and creates a nonreciprocal for the system. When a kicked Gaussian wave packet propagates through the waveguide arrays, diode effects are formed. Dependence between the diode effect and the SGP is studied. We found that the threshold of the reverse breakdown of this optical diode exhibits a perfect linear dependence against the SGP, and an extremely high diode quality can be achieved when the initial phase tilt exactly compensates the initial momentum provided by the SGP. Moreover, the direction of the diode can be switched by the direction of the SGP, which brings additional freedom to control the one-way propagation of the DSs. Our finding may have potential application to realizing new devices in high-speed all-optical communications.

Exploring the Multidimensional Facets of Authoritarianism: Authoritarian Aggression and Social Dominance Orientation

2008 ◽  
Vol 67 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Stefano Passini
Keyword(s):  
Social Dominance ◽  
Factor Model ◽  
Three Dimensional ◽  
Social Dominance Orientation ◽  
Model Fit ◽  
Regression Analyses ◽  
One Dimensional ◽  
Confirmatory Factor ◽  
The One ◽  
Better Than

The relation between authoritarianism and social dominance orientation was analyzed, with authoritarianism measured using a three-dimensional scale. The implicit multidimensional structure (authoritarian submission, conventionalism, authoritarian aggression) of Altemeyer’s (1981, 1988) conceptualization of authoritarianism is inconsistent with its one-dimensional methodological operationalization. The dimensionality of authoritarianism was investigated using confirmatory factor analysis in a sample of 713 university students. As hypothesized, the three-factor model fit the data significantly better than the one-factor model. Regression analyses revealed that only authoritarian aggression was related to social dominance orientation. That is, only intolerance of deviance was related to high social dominance, whereas submissiveness was not.

FURTHER TESTS OF VALIDITY FOR THE ONE-DIMENSIONAL HONG'S PSYCHOLOGICAL REACTANCE SCALE

2007 ◽  
Vol 101 (7) ◽  
pp. 871 ◽  
Author(s):  
PETER K. JONASON
Keyword(s):  
Psychological Reactance ◽  
One Dimensional ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

A New Algorithm for the One-Dimensional Cutting Stock Problem

2006 ◽  
Vol 1 (2) ◽  
pp. 78-84
Author(s):  
Sarath. B. Siyambalapitiya ◽  
Keyword(s):  
Cutting Stock Problem ◽  
Cutting Stock ◽  
One Dimensional ◽  
The One
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