【摘 要】
：
A kind of nested eccentric waveguide constructed with two cylindrical nanowires coated with graphene was designed.The mode characteristics of this waveguide were studied using the multipole method.It was found that the three lowest modes(mode 0,mode 1 and
【机 构】
：
Key Laboratory of Instrumentation Science and Dynamic Measurement of Ministry of Education,North Uni
论文部分内容阅读
A kind of nested eccentric waveguide constructed with two cylindrical nanowires coated with graphene was designed.The mode characteristics of this waveguide were studied using the multipole method.It was found that the three lowest modes(mode 0,mode 1 and mode 2)can be combined by the zero-order mode or/and the first-order modes of two single nano wires.Mode 0 has a higher figure of merit and the best performance among these modes within the parameter range of interest.The mode characteristics can be adjusted by changing the parameters of the waveguide.For example,the propagation length will be increased when the operating wavelength,the minimum spacing between the inner and outer cylinders,the inner cylinder radius and the Fermi energy are increased.However,when the outer cylinder radius,the dielectric constants of region I,or the dielectric constants of region Ⅲ are increased,the opposite effect can be seen.These results are consistent with the results obtained using the finite element method(FEM).The waveguide structure designed in this paper is easy to fabricate and can be applied to the field of micro/nano sensing.
其他文献
非洲猪瘟作为一种高度传染性、病毒性、出血性疾病,有着病程较短、传播速度快、死亡率高等特点,非洲猪瘟病毒:一种双链DNA病毒,是非洲猪瘟arviridae科非洲猪瘟ivirus属的唯一成员,该病毒主要在巨噬细胞的细胞质中复制.非洲猪瘟病毒在其储存宿主中通常无症状,并发生持续性感染,然而,感染家猪会引起严重的充血出血、呼吸困难甚至造成猪只死亡.为了深入研究非洲猪瘟,全面了解非洲猪瘟的流行史、基因分型、诊断与防控等要点十分必要,文章就非洲猪瘟基因组特征及国内外流行情况进行简要介绍,以期为后续非洲猪瘟相关研究提供
When the GaAs/AlGaAs superlattice-based devices are used under irradiation environments,point defects may be created and ultimately deteriorate their electronic and transport properties.Thus,understanding the properties of point defects like vacancies and
The study of boron structure is fascinating because boron has various allotropes containing boron icosahedrons under pressure.Here,we propose a new boron structure(space group Fm3m)that is dynamically stable at 1.4 tera-Pascal(TPa)using density functional
金黄色葡萄球菌(Staphylococcus aureus,S.aureus)是一种无芽胞、无鞭毛的革兰氏阳性菌,显微镜下似葡萄串状,直径0.5～1.5 μm,适宜在普通培养基和血琼脂培养基上生长,在麦康凯平板培养基上几乎不能繁殖.该菌广泛存在于大气环境、饲料、食物、水源、场地以及物体表面,对人和畜禽具有一定的致病性,可引发受伤感染、化脓病症、肠内炎症、败血症及毒素作用,可存在于畜禽的表皮、黏膜、大肠、鼻腔及气管,甚至是乳腺中.近年来,金黄色葡萄球菌耐甲氧西林分离株的逐渐增加,耐药性发生变异,临床用药变得
We numerically study the phase behaviors of colloids with anisotropic diffusion in two dimensions.It is found that the diffusion anisotropy of colloidal particles plays an important role in the phase transitions.A strong diffusion anisotropy induces the l
We investigate the influence of an external electric field on the dewetting behavior of nitrogen-water systems between two hydrophobic plates using molecular dynamics simulations.It is found that the critical distance of dewetting increases obviously with
文章所述的天然植物饲料原料特指2021年版《饲料原料目录》第三部分中,原料编号“7.6”下的117种可饲用天然植物.这些药食同源天然植物饲料原料,具有多种营养活性、无或低毒副作用、不易产生抗药性,能够维持肠道健康,提高机体的消化吸收与非特异性免疫功能,降低发病率,从而提高动物的生产性能,改善饲料报酬,提升包括胴体品质、奶品质、蛋品质等在内的产品品质与风味.
引言rn近年来,由非洲猪瘟病毒引起的疫情在世界各地广泛传播,非洲猪瘟发病频率高、影响范围广、持续时间长的特点使得非洲猪瘟成为养猪业的主要威胁.2018年8月,中国暴发了非洲猪瘟,给中国养猪业造成了巨大损失.非洲猪瘟病毒的传播途径有直接接触、间接接触两种,直接接触多是健康猪与携带病毒或确诊的猪密切接触所致.
1878年Koch等人从实验小白鼠体内分离出猪丹毒杆菌,自此,人们开始认识到猪丹毒病的存在.而且以后很长的一段时间里世界范围内的养猪场都不同程度地遭受了猪丹毒带来的巨大损失.在我国,20世纪80年代到90年代初期,猪丹毒与猪瘟、猪肺疫并称为困扰中国养猪业的“三大传染病”.
As a prototype material of colossal barocaloric effects,neopentylglycol is investigated by combining high-precision differential scanning calorimetric measurement and high-energy x-ray diffraction measurement.The diffraction data at con-stant temperatures