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Effect of point defects on band-gap properties in diamond structure photonic crystals EI SCIE Scopus
期刊论文 | 2012 , 111 (2) | JOURNAL OF APPLIED PHYSICS | IF: 2.21
WoS CC Cited Count: 4
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Abstract :

Three dimensional diamond structure photonic crystals (PCs) with point defects fabricated by rapid prototyping and gel casting with alumina were studied at microwave frequencies. The sphere, ellipsoid, and cylinder point defects were introduced in the PCs first and it was found that the localization of electromagnetic wave is the strongest in ellipsoid point defect photonic crystals. Then, the size change of the ellipsoid point defect was studied to find out the optimal size. When the size of the ellipsoid point defect is close to one unit cell, the Q factor, which represents the localization intensity of the electromagnetic wave, will be the biggest. Based on the optimal size of ellipsoid point defect, more ellipsoid point defects were introduced into one diamond PC structure. Three point defect resonant modes were found in a photonic crystal with three ellipsoid point defects and the distance between each defect was twice of the lattice constant. A guided band was observed in the forbidden band gap in a photonic crystal with five ellipsoid point defects, in which the distance between each defect was of one lattice constant. (C) 2012 American Institute of Physics.

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GB/T 7714 Dai, Wei , Wang, Hong , Chen, Shibin et al. Effect of point defects on band-gap properties in diamond structure photonic crystals [J]. | JOURNAL OF APPLIED PHYSICS , 2012 , 111 (2) .
MLA Dai, Wei et al. "Effect of point defects on band-gap properties in diamond structure photonic crystals" . | JOURNAL OF APPLIED PHYSICS 111 . 2 (2012) .
APA Dai, Wei , Wang, Hong , Chen, Shibin , Li, Dichen , Zhou, Di . Effect of point defects on band-gap properties in diamond structure photonic crystals . | JOURNAL OF APPLIED PHYSICS , 2012 , 111 (2) .
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Bandgap properties of diamond structure photonic crystals with line defects EI SCIE Scopus
期刊论文 | 2012 , 111 (8) | JOURNAL OF APPLIED PHYSICS | IF: 2.21
WoS CC Cited Count: 3
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Three dimensional diamond structure photonic crystals with line defects fabricated by rapid prototyping and gel casting with alumina were studied. The influence of the line defect shapes, which include rectangular, ellipse, circle, and square shapes of the cross section, on the transmission properties of the electromagnetic wave was first studied. The resonant mode of the rectangular line defect is the strongest with the guiding band from 11.0 to 11.75GHz and the normalized resonant intensity is 0.8. If the TE10 mode of the propagating electromagnetic wave is parallel to the polarization direction of the rectangular line defect, the property of the line defect will be strengthened. Two separate line defects with a point defect between them can realize the properties of a straight complete line defect through the coupling between them. The bending properties of the line defect were investigated with the bending angle from 0 degrees to 90 degrees at 15 degrees interval. With the increasing of the bending angle, the guiding bandwidth was reduced slowly while the resonant intensity did not change too much. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3703569]

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GB/T 7714 Dai, Wei , Wang, Hong , Chen, Shibin . Bandgap properties of diamond structure photonic crystals with line defects [J]. | JOURNAL OF APPLIED PHYSICS , 2012 , 111 (8) .
MLA Dai, Wei et al. "Bandgap properties of diamond structure photonic crystals with line defects" . | JOURNAL OF APPLIED PHYSICS 111 . 8 (2012) .
APA Dai, Wei , Wang, Hong , Chen, Shibin . Bandgap properties of diamond structure photonic crystals with line defects . | JOURNAL OF APPLIED PHYSICS , 2012 , 111 (8) .
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Diamond electromagnetic band gap structure based on Bi(Nb0.992V0.008)O-4 ceramic EI SCIE Scopus
期刊论文 | 2011 , 22 (4) , 422-425 | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | IF: 1.076
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Three-dimensional (3D) diamond structure electromagnetic band gap (EBG) structures containing high-K Bi(Nb0.992V0.008)O-4 (BVN) ceramic, fabricated by rapid-prototyping (RP) and gel casting methods, were investigated. The simulations based on finite element method (FEM) were employed to model the band structures. High-K Bi(Nb0.992V0.008)O-4 ceramic was made into gel to cast into the diamond structure molds fabricated by rapid-prototyping method. Then the green bodies were sintered at 900 A degrees C to obtain well densified EBG samples. The transmission characteristics of the EBG structures were measured by transmission/reflection (T/R) methods using a vector network analyzer. Wide complete band gap was observed in the transmission characteristics from 10.08 to 12.59 GHz and it agreed well with the simulation results, which was from 10 to 12.19 GHz.

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GB/T 7714 Dai, Wei , Wang, Hong , Wang, Minjie et al. Diamond electromagnetic band gap structure based on Bi(Nb0.992V0.008)O-4 ceramic [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2011 , 22 (4) : 422-425 .
MLA Dai, Wei et al. "Diamond electromagnetic band gap structure based on Bi(Nb0.992V0.008)O-4 ceramic" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 22 . 4 (2011) : 422-425 .
APA Dai, Wei , Wang, Hong , Wang, Minjie , Shen, Zhiyuan , Li, Dichen , Zhou, Di . Diamond electromagnetic band gap structure based on Bi(Nb0.992V0.008)O-4 ceramic . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2011 , 22 (4) , 422-425 .
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Fabrication of three-dimensional electromagnetic band-gap structure with high-K dielectric ceramics by rapid-prototyping EI SCIE Scopus
期刊论文 | 2010 , 25 (2-4) , 218-222 | JOURNAL OF ELECTROCERAMICS | IF: 0.676
WoS CC Cited Count: 3
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Abstract :

Three-Dimensional diamond structure electromagnetic band-gap (EBG) structures containing high-K dielectric ceramic Bi(Nb(0.992) V(0.008))O(4) (BVN) fabricated by rapid-prototyping (RP) technique were investigated. The simulations based on finite element method (FEM) were employed to model the band diagram. The influences of structure dimensions, aspect ratio and permittivity contrast on the band gap width were studied. The optimal band gap width EBGs were fabricated and investigated experimentally. EBG structures composed of epoxy resin diamond lattice and inverse-diamond lattice made of high-K BVN ceramic with silica gel were fabricated by RP method. The transmission characteristics of the EBG structures were measured by transmission/reflection (T/R) methods with a vector network analyzer. Obvious wide band-gaps of two EBGs with different lattice parameters were observed in the curve of transmission characteristics, which agreed well with the simulation results.

Keyword :

EBG FEM RP technique Diamond structure T/R method BVN ceramic

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GB/T 7714 Dai, Wei , Wang, Hong , Wang, Minjie et al. Fabrication of three-dimensional electromagnetic band-gap structure with high-K dielectric ceramics by rapid-prototyping [J]. | JOURNAL OF ELECTROCERAMICS , 2010 , 25 (2-4) : 218-222 .
MLA Dai, Wei et al. "Fabrication of three-dimensional electromagnetic band-gap structure with high-K dielectric ceramics by rapid-prototyping" . | JOURNAL OF ELECTROCERAMICS 25 . 2-4 (2010) : 218-222 .
APA Dai, Wei , Wang, Hong , Wang, Minjie , Shen, Zhiyuan , Li, Dichen , Zhou, Di et al. Fabrication of three-dimensional electromagnetic band-gap structure with high-K dielectric ceramics by rapid-prototyping . | JOURNAL OF ELECTROCERAMICS , 2010 , 25 (2-4) , 218-222 .
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The Ultra-Wide Band Gap Property Induced by Lattice Period Gradually Changing in Three-Dimensional Photonic Crystals EI SCIE Scopus
期刊论文 | 2010 , 93 (12) , 3980-3982 | JOURNAL OF THE AMERICAN CERAMIC SOCIETY | IF: 2.169
WoS CC Cited Count: 11
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The lattice period gradually changing and its ultra-wide band gap property were studied in the three-dimensional diamond photonic crystals (PC) fabricated by rapid prototyping and gel casting techniques using alumina. The band gap width and center frequency of the band gap almost kept stable when the lattice period changed along the direction in vertical to the propagation direction of the electromagnetic wave. When the lattice period stretched along the propagation direction of the electromagnetic wave, the center frequency of the band gap shifted to the lower frequency range while the band gap width increased slightly. Several PCs that stretched along the electromagnetic wave propagation direction were combined together to investigate their complex band gap properties. The band gap width increased with the period change of the combined PCs. When the period change reached 134%, the band gap width became the widest and was 153% of that of the perfect PC, which agreed well with the simulation results by Ansoft HFSS.

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GB/T 7714 Dai, Wei , Wang, Hong , Zhou, Di et al. The Ultra-Wide Band Gap Property Induced by Lattice Period Gradually Changing in Three-Dimensional Photonic Crystals [J]. | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2010 , 93 (12) : 3980-3982 .
MLA Dai, Wei et al. "The Ultra-Wide Band Gap Property Induced by Lattice Period Gradually Changing in Three-Dimensional Photonic Crystals" . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY 93 . 12 (2010) : 3980-3982 .
APA Dai, Wei , Wang, Hong , Zhou, Di , Shen, Zhiyuan , Li, Yong , Li, Dichen . The Ultra-Wide Band Gap Property Induced by Lattice Period Gradually Changing in Three-Dimensional Photonic Crystals . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2010 , 93 (12) , 3980-3982 .
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利用CAD软件和成型机快速制作气缸原型 PKU
期刊论文 | 1998 , (2) , 37-38 | 机械设计
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Abstract :

运用一种Pro/Engineer造型软件对气缸三维实体造型,然后利用软件提供的接口实现数据转换,在激光快速成型机上制作气缸物理原型,缩短了制作周期,节约了成本.

Keyword :

激光快速成型 Pro/Engineer软件 气缸 气缸造型 气缸成型

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GB/T 7714 郭九生 , 王军杰 , 李涤尘 et al. 利用CAD软件和成型机快速制作气缸原型 [J]. | 机械设计 , 1998 , (2) : 37-38 .
MLA 郭九生 et al. "利用CAD软件和成型机快速制作气缸原型" . | 机械设计 2 (1998) : 37-38 .
APA 郭九生 , 王军杰 , 李涤尘 , 卢秉恒 . 利用CAD软件和成型机快速制作气缸原型 . | 机械设计 , 1998 , (2) , 37-38 .
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基于快速成型和制造技术的叶轮原型制作 PKU
期刊论文 | 1998 , (9) , 14-16 | 机械设计
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如何缩短产品开发时间、节约成本、快速构造零件原型是当前制造业面临的问题之一.快速成型和制造技术的出现为其提供了实现的手段.本文针对快速成型和制造技术在叶轮原型制作中的应用,介绍了快速成型和制造技术的原理以及具体实现叶轮原型的制作过程.

Keyword :

叶轮 原型制作 快速成型和制造 叶轮原型

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GB/T 7714 郭九生 , 洪军 , 卢秉恒 . 基于快速成型和制造技术的叶轮原型制作 [J]. | 机械设计 , 1998 , (9) : 14-16 .
MLA 郭九生 et al. "基于快速成型和制造技术的叶轮原型制作" . | 机械设计 9 (1998) : 14-16 .
APA 郭九生 , 洪军 , 卢秉恒 . 基于快速成型和制造技术的叶轮原型制作 . | 机械设计 , 1998 , (9) , 14-16 .
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