FDTD Numerical Analysis of Transmission Enhancement on Two-Dimensional Hole Array

2012 ◽  
Vol 182-183 ◽  
pp. 929-932
Author(s):  
Jie Yin ◽  
Shu Yang ◽  
Chong Pan
Keyword(s):  
Metal Film ◽  
Silver Film ◽  
Transmission Rate ◽  
Metal Plate ◽  
Transmission Peak ◽  
Hole Array ◽  
Two Dimensional ◽  
Rate Transmission ◽  
Relative Transmission ◽  
Transmission Enhancement

Numerical simulation about transmission enhancement phenomenon on metal film hole array has been finished in the paper by East FDTD commercial software. In some wavelengths, relative transmission rate is more than 1 and we also study that the thickness of metal plate, the size of the hole and period on influence of the transmission rate. Transmission enhancement peak lowers with the increasing of silver film thickness, enlarger along with the increasing of the aperture, And when period of hole gets larger, transmission peak will shift.

scholarly journals Two-Dimensional Imaging of Permittivity Distribution by an Activated Meta-Structure with a Functional Scanning Defect

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 239 ◽  
Author(s):  
Go Itami ◽  
Osamu Sakai ◽  
Yoshinori Harada
Keyword(s):  
Millimeter Wave ◽  
Experimental Studies ◽  
Metal Plate ◽  
Skin Depth ◽  
Electromagnetic Properties ◽  
Hole Array ◽  
Imaging Method ◽  
Two Dimensional ◽  
Optical Wave ◽  
Biomedical Diagnosis

A novel 2D imaging method for permittivity imaging using a meta-structure with a functional scanning defect is proposed, working in the millimeter wave-range. The meta-structure we used here is composed of a perforated metal plate with subwavelength-holes and a needle-like conductor that can scan two-dimensionally just beneath the plate. The metal plate, which is referred to as a metal hole array (MHA) in this study, is known as a structure supporting propagation of spoof surface plasmon polaritons (SSPPs). High-frequency waves with frequencies higher than microwaves, including SSPPs, have the potential to detect signals from inner parts embedded beneath solid surfaces such as living cells or organs under the skin, without physical invasion, because of the larger skin depth penetration of millimeter wave-bands than optical wave-bands. Focused on activated SSPPs, the localized distortion of SSPP modes on an MHA is used in the proposed method to scan the electromagnetic properties of the MHA with a needle-like conductor (conductive probe), which is a kind of active defect-initiator. To show the validity of the proposed method, electromagnetic analyses of the localized distortions of wave fields were performed, and one- and two-dimensional imaging experiments were conducted with the aim of detecting both conductive and dielectric samples. The analytical results confirmed the localized distortion of the electric field distribution of SSPP modes and also indicated that the proposed method has scanning ability. In experimental studies, the detection of conductive and dielectric samples was successful, where the detected dielectrics contained pseudo-biological materials, with an accuracy on the order of millimeters. Finally, a biomedical diagnosis in the case of a rat lung is demonstrated by using the experimental system. These results indicate that the proposed method may be usable for non-invasive and low-risk biomedical diagnosis.

Research on L-PPM Modulation Rate of Pulse Fiber Lasers

2014 ◽  
Vol 926-930 ◽  
pp. 1787-1790
Author(s):  
Zi Qiang Hao ◽  
Hong Zuo Li ◽  
Xin Ren
Keyword(s):  
Fiber Laser ◽  
Peak Power ◽  
Transmission Rate ◽  
Repetition Frequency ◽  
High Rate ◽  
High Peak Power ◽  
Device Processing ◽  
Rate Transmission ◽  
Modulation Rate ◽  
Pulsed Fiber Laser

Compared with continuous laser, pulsed fiber laser has the advantages of high peak power, which is widely used in device processing, military defense and other areas. As the repetition frequency of pulsed fiber laser is low and therefore it cannot realize high rate transmission, this paper does the research on L-PPM modulation of pulsed fiber laser to find a method of effectively improving the modulation rate of pulsed fiber laser. Experimental results show that the L-PPM modulation can improve the transmission rate of the pulsed fiber laser whose repetition frequency is 200K to 1.387Mbps. The research results are useful for the application of pulsed fiber laser in communication.

scholarly journals Smith-Purcell radiation based on the transmission enhancement of a subwavelength hole array with inner tunnels

2021 ◽  
Vol 29 (5) ◽  
pp. 7767
Author(s):  
Ping Zhang ◽  
Deqiang Zhao ◽  
Xiaosong Wang ◽  
Shaomeng Wang ◽  
Yusuke Sakai ◽  
...  
Keyword(s):  
Hole Array ◽  
Transmission Enhancement

scholarly journals A High Performance Target Tracing Transmission Model Oriented to Lifecycle Maximization

2016 ◽  
Vol 2016 ◽  
pp. 1-11
Author(s):  
Zhong-Nan Zhao ◽  
Pei-Li Qiao ◽  
Jian Wang
Keyword(s):  
High Speed ◽  
High Performance ◽  
Network Performance ◽  
Transmission Rate ◽  
Relay Node ◽  
High Rate ◽  
Transmission Model ◽  
Limited Resources ◽  
Speed Sensor ◽  
Rate Transmission

For the high speed sensor networks applications such as Internet of Things, multimedia transmission, the realization of high-rate transmission under limited resources has become a problem to be solved. A high speed transmission and energy optimization model oriented to lifecycle maximization is proposed in this paper. Based on information-directed mechanism, the energy threshold set and the relay node distance selection will be done in the process of target tracing, as a result, retaining a balance between transmission rate and energy consumption. Meanwhile, multiagent coevolution is adopted to achieve the maximum of network lifecycle. Comparing with the relevant methods, indexes for network such as hops, throughput, and number of active nodes, standard deviation of remaining energy, and the network lifecycle are considered, and the simulated experiments show that the proposed method will promote the transmission rate effectively, prolong the network lifecycle, and improve network performance as a whole.

Методика практического восстановления параметров формы поверхностных двухмерных дефектов с учетом нелинейных свойств ферромагнетика

2021 ◽  
pp. 46-55
Author(s):  
А.В. Никитин ◽  
А.В. Михайлов ◽  
А.С. Петров ◽  
С.Э. Попов
Keyword(s):  
Magnetic Field ◽  
Free Surface ◽  
Numerical Experiments ◽  
Input Data ◽  
Metal Plate ◽  
Two Dimensional ◽  
Nonlinear Properties ◽  
Data Errors ◽  
The Magnetic Field

A technique for determining the depth and opening of a surface two-dimensional defect in a ferromagnet is presented, that is resistant to input data errors. Defects and magnetic transducers are located on opposite sides of the metal plate. The nonlinear properties of the ferromagnet are taken into account. The components of the magnetic field in the metal were reconstructed from the measured components of the magnetic field above the defect-free surface of the metal. As a result of numerical experiments, the limits of applicability of the method were obtained. The results of the technique have been verified experimentally.

Generalisation of the Condition for Waviness in the Pressure Distribution on a Cambered Plate

1963 ◽  
Vol 67 (632) ◽  
pp. 529-530 ◽  
Author(s):  
E. Angus Boyd
Keyword(s):  
Pressure Distribution ◽  
Surface Pressure ◽  
Leading Edge ◽  
Metal Plate ◽  
Two Dimensional ◽  
Striking Result ◽  
Surface Pressure Distribution

Recently some data from tests done on a cambered plate have been published. The shape of metal plate aerofoil tested matched that taken up by a flexible two-dimensional sail. The most striking result in the rneasurements was the waviness present near the leading edge in the upper surface pressure distribution. To find the theoretical conditions under which such a waviness would occur a parabolic skeleton aerofoil was investigated, as this shape differed little from the actual aerofoil tested.

A Spatial Resolution of Residual Stress Measurements Using the Deep Hole Drilling Technique

2010 ◽  
Author(s):  
Alexandros Skouras ◽  
Martyn J. Pavier ◽  
Anton Shterenlikht
Keyword(s):  
Residual Stress ◽  
Spatial Distribution ◽  
Element Model ◽  
High Accuracy ◽  
Metal Plate ◽  
Hole Drilling ◽  
Two Dimensional ◽  
Deep Hole ◽  
Drilling Technique ◽  
Dimensional Finite Element

This paper describes a study of the ability of the DHD technique to measure the spatial distribution of residual stresses. A two dimensional finite element model of a metal plate has been generated together with a representative state of residual stress. A simulation of the DHD technique is then carried out to provide a series of measurements of the residual stress which can be compared with the known residual stress. This simulation allows the effect of the varying trepan diameters on the accuracy of the DHD technique to be explored. The results of the simulation show that the DHD technique can be used to measure residual stress with a high accuracy, but the increase in the trepan diameter introduce some errors. Suggestions and techniques for reducing these errors are presented.

Numerical investigation of the transmission enhancement through subwavelength hole array

2007 ◽  
Vol 274 (1) ◽  
pp. 236-240 ◽  
Author(s):  
Yuegang Chen ◽  
Yanhua Wang ◽  
Yan Zhang ◽  
Shutian Liu
Keyword(s):  
Numerical Investigation ◽  
Hole Array ◽  
Transmission Enhancement

TWO-DIMENSIONAL ARRAY OF ION TRAPS ON A PLANAR CHIP

2009 ◽  
Vol 23 (01) ◽  
pp. 47-61
Author(s):  
JIN-YIN WAN ◽  
YU-ZHU WANG ◽  
LIANG LIU
Keyword(s):  
Basic Structure ◽  
Ion Traps ◽  
Metal Plate ◽  
Two Dimensional ◽  
Chip Design ◽  
Single Plane ◽  
Dimensional Array ◽  
Linear Ion Traps ◽  
Lateral Extent ◽  
Microfabrication Techniques

We investigate a planar ion chip design with a two-dimensional array of linear ion traps for the scalable quantum information processor. The segmented electrodes reside in a single plane on a substrate and a grounded metal plate, a combination of appropriate rf and DC potentials are applied to them for stable ion confinement, and the trap axes are located above the surface at a distance controlled by the electrodes' lateral extent and the substrate's height as discussed. The potential distributions are calculated using static electric field qualitatively. This architecture is conceptually simple and many current microfabrication techniques are feasible for the basic structure. It may provide a promising route for scalable quantum computers.

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