scholarly journals Band gap characteristics of radial wave in a two-dimensional cylindrical shell with radial and circumferential periodicities

AIP Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 035110
Author(s):  
Shuowei An ◽  
Haisheng Shu ◽  
Shanjun Liang ◽  
Xiaona Shi ◽  
Lei Zhao
Keyword(s):  
Cylindrical Shell ◽  
Band Gap ◽  
Two Dimensional ◽  
Radial Wave ◽  
Gap Characteristics

Effects of Filling Ratio and Lattice Points Direction on Two-Dimensional Triangular-Lattice Photonic Crystal Band Gap Characteristics

2013 ◽  
Vol 33 (1) ◽  
pp. 0116003
Author(s):  
韩利红 Han Lihong ◽  
刘立明 Liu Liming ◽  
俞重远 Yu Zhongyuan ◽  
郭璇 Guo Xuan ◽  
袁桂芳 Yuan Guifang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Triangular Lattice ◽  
Filling Ratio ◽  
Lattice Points ◽  
Two Dimensional ◽  
Gap Characteristics

A few-layer InSe-based sensitivity-enhanced photothermal fiber sensor

2020 ◽  
Vol 8 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Rui Wang ◽  
Qing Wu ◽  
Xiantao Jiang ◽  
Taojian Fan ◽  
Jia Guo ◽  
...  
Keyword(s):  
Band Gap ◽  
Transport Property ◽  
Electrical Transport ◽  
Electrical Transport Property ◽  
Fiber Sensor ◽  
Two Dimensional ◽  
Direct Band Gap ◽  
Gap Characteristics ◽  
Direct Band ◽  
Photo Response

Two-dimensional (2D) InSe has recently attracted increasing attention due to its outstanding electrical transport property, excellent photo-response, and direct band gap characteristics.

scholarly journals Research on the Band Gap Characteristics of Two-Dimensional Phononic Crystals Microcavity with Local Resonant Structure

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Mao Liu ◽  
Pei Li ◽  
Yongteng Zhong ◽  
Jiawei Xiang
Keyword(s):  
Band Gap ◽  
Phononic Crystal ◽  
Engineering Application ◽  
Low Frequency ◽  
Phononic Crystals ◽  
Band Gaps ◽  
Wave Band ◽  
Two Dimensional ◽  
Frequency Range ◽  
Gap Characteristics

A new two-dimensional locally resonant phononic crystal with microcavity structure is proposed. The acoustic wave band gap characteristics of this new structure are studied using finite element method. At the same time, the corresponding displacement eigenmodes of the band edges of the lowest band gap and the transmission spectrum are calculated. The results proved that phononic crystals with microcavity structure exhibited complete band gaps in low-frequency range. The eigenfrequency of the lower edge of the first gap is lower than no microcavity structure. However, for no microcavity structure type of quadrilateral phononic crystal plate, the second band gap disappeared and the frequency range of the first band gap is relatively narrow. The main reason for appearing low-frequency band gaps is that the proposed phononic crystal introduced the local resonant microcavity structure. This study provides a good support for engineering application such as low-frequency vibration attenuation and noise control.

scholarly journals Two-dimensional photonic crystal band gap characteristics

2011 ◽  
Vol 60 (10) ◽  
pp. 104214
Author(s):  
Yuan Gui-Fang ◽  
Han Li-Hong ◽  
Yu Zhong-Yuan ◽  
Liu Yu-Min ◽  
Lu Peng-Fei
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Two Dimensional ◽  
Dimensional Photonic Crystal ◽  
Gap Characteristics ◽  
Two Dimensional Photonic Crystal

scholarly journals Vibration Band Gap Characteristics of Two-Dimensional Periodic Double-Wall Grillages

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7174
Author(s):  
Chuanlong Wang ◽  
Xiongliang Yao ◽  
Guoxun Wu ◽  
Li Tang
Keyword(s):  
Finite Element ◽  
Band Gap ◽  
Transfer Functions ◽  
Finite Element Calculation ◽  
Vibration Band ◽  
Two Dimensional ◽  
Element Calculation ◽  
Band Theory ◽  
Gap Characteristics ◽  
Double Wall

In this article, the wave finite element method (WFEM) is used to calculate the band gap characteristics of two-dimensional (2D) periodic double-wall grillages (DwGs), which are verified by the grillage model vibration measurement experiment and finite element calculation. To obtain the band gap characteristics of periodic DwGs, the finite element calculation model is established according to the lattice and energy band theory and the characteristic equation of the periodic unit cell under the given wave vector condition is solved based on Bloch theorem. Then, the frequency transfer functions of finite-length manufactured and finite element models are obtained to verify the band gap characteristics of periodic DwGs. Finally, the effects of material parameters and structural forms on band gap characteristics and transfer functions are analyzed, which can provide a reference for engineering structure vibration and noise reduction design.

scholarly journals Wave Propagation and Band-Gap Characteristics of Chiral Lattices

2007 ◽  
Author(s):  
Stefano Gonella ◽  
Alessandro Spadoni ◽  
Massimo Ruzzene ◽  
Fabrizio Scarpa
Keyword(s):  
Wave Propagation ◽  
Plane Wave ◽  
Band Gap ◽  
Traveling Waves ◽  
Two Dimensional ◽  
Wave Velocities ◽  
Gap Characteristics ◽  
Bloch’S Theorem ◽  
Plane Wave Propagation

Plane wave propagation in a chiral lattice is investigated through the application of Bloch’s theorem. Two-dimensional dispersion relations are estimated and analyzed to illustrate peculiar properties of chiral or non-centrosymmetric configurations and investigate the directional behavior of wave propagation for varying geometric parameters. Special attention is devoted to the determination of phase and group wave velocities. Considerations based upon the analysis of velocity plots are compared with results obtained from dispersion curves to further validate the directional behavior of the proposed lattice. Finally, The relation of directionality with frequency of the traveling waves is discussed.

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