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第一类与第二类外尔半金属界面上的菲涅尔反射系数 认领
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作者 刘昕 《光学技术》 CAS CSCD 北大核心 2020年第3期342-346,共5页
作为一种新型拓扑材料,外尔半金属及其光学性质是当前凝聚态物理以及光学领域的研究热点。根据人们的最新研究成果,介绍了第一类与第二类外尔半金属界面上菲涅尔反射系数的计算方法,模拟并揭示了不同化学势下菲涅尔反射系数随入射角θi... 作为一种新型拓扑材料,外尔半金属及其光学性质是当前凝聚态物理以及光学领域的研究热点。根据人们的最新研究成果,介绍了第一类与第二类外尔半金属界面上菲涅尔反射系数的计算方法,模拟并揭示了不同化学势下菲涅尔反射系数随入射角θi和狄拉克锥倾斜度αt的演变规律。研究结果表明,随着化学势和狄拉克锥倾斜度αt的变化,第一类与第二类外尔半金属的反射系数以及布儒斯特角呈现出不同的演变规律。理论上可以通过化学掺杂并测量外尔半金属界面上的菲涅尔反射系数来判断外尔半金属的种类。 展开更多
关键词 光学材料 外尔半金属 菲涅尔反射系数 光导率 化学势
Micro-scale Additive Manufacturing Using the Optical Potential Generated by a Bessel Beam 认领
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作者 Masaki Michihata Makoto Yokei +1 位作者 Shotaro Kadoya Satoru Takahashi 《纳米制造与计量(英文)》 2020年第4期292-298,共7页
In this study,we proposed a novel micro-scale additive manufacturing method based on the optical potential formed by a Bessel beam.The proposed technique is expected to show no deterioration in manufacturing resolutio... In this study,we proposed a novel micro-scale additive manufacturing method based on the optical potential formed by a Bessel beam.The proposed technique is expected to show no deterioration in manufacturing resolution due to heat genera-tion,to be applicable to various materials,and to be able to be performed in an air environment.The basic principle of the proposed method involves accumulating and stacking particles dispersed in air by using optical radiation pressure.In this paper,the trajectory of the accumulated particles was numerically estimated and experimentally observed.The numerical and experimental results agreed well;specfially,the back ground flow carried the particles to the optical axis of the Bessel beam,and then the particles were localized at the bottom of the optical potential valley on the substrate.Finally,a pillar structure was fabricated with polystyrene particles having a diameter of 1 um,which indicated that the proposed technique was promising for practical applications. 展开更多
关键词 Additive manufacturing Optical radiation pressure Optical trapping potential Bessel beam NANOPARTICLES
利用12C+^96Zr弹性散射角分布研究96Zr的中子皮 认领
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作者 丁若晴 杜亚秋 +1 位作者 李志宏 王韩奎 《原子能科学技术》 EI CAS CSCD 北大核心 2020年第1期1-5,共5页
中子皮是原子核的关键物理参数之一,对非对称核物质状态方程有重要的约束作用。本工作主要利用12C+^96Zr弹性散射角分布研究96Zr的中子皮,首先采用Woods-Saxon势,通过改变实部势参数得到与实验数据拟合最优的1组光学势参数,然后利用双... 中子皮是原子核的关键物理参数之一,对非对称核物质状态方程有重要的约束作用。本工作主要利用12C+^96Zr弹性散射角分布研究96Zr的中子皮,首先采用Woods-Saxon势,通过改变实部势参数得到与实验数据拟合最优的1组光学势参数,然后利用双折叠势模型(DFM)计算96Zr在不同中子密度分布下与12C的相互作用势,通过比较两组相互作用势,找出与最佳光学势对应的96Zr核的中子分布均方根半径,从而得到96Zr的中子皮厚度为0.087 fm,此结果与其他研究结果在误差范围内符合很好。 展开更多
关键词 光学势 弹性散射 双折叠势 密度分布
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Global optical model potential describing 12C-nucleus elastic scattering 认领
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作者 徐永丽 韩银录 +4 位作者 苏新武 孙小军 梁海英 郭海瑞 蔡崇海 《中国物理C:英文版》 SCIE CAS CSCD 2020年第12期123-132,共10页
We construct a new global optical model potential to describe the elastic scattering of 12C.The experimental data of elastic-scattering angular distributions and total reaction cross sections for targets from 24Mg to ... We construct a new global optical model potential to describe the elastic scattering of 12C.The experimental data of elastic-scattering angular distributions and total reaction cross sections for targets from 24Mg to 209Bi are considered below 200 MeV within the framework of the optical model.The results calculated using the derived global optical potential are then compared with the existing experimental data.The reliability of the global optical potential is further tested by predicting the elastic scattering data out of the mass and energy ranges,within which the global potential parameters are determined,and reasonable results are also obtained. 展开更多
关键词 optical model potential elastic-scattering angular distribution reaction cross section
Applicability of 9Be global optical potential to description of 8,10,11B elastic scattering 认领
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作者 徐永丽 韩银录 +3 位作者 梁海英 吴振东 郭海瑞 蔡崇海 《中国物理C:英文版》 SCIE CAS CSCD 2020年第3期65-72,共8页
We achieved a set of 9Be global phenomenological optical model potentials by fitting a large experimental dataset of the elastic scattering observable for target mass numbers from 24 to 209.The obtained 9Be global opt... We achieved a set of 9Be global phenomenological optical model potentials by fitting a large experimental dataset of the elastic scattering observable for target mass numbers from 24 to 209.The obtained 9Be global optical model potential was applied to predict elastic-scattering angular distributions and total reaction cross-sections of 8,10,11B projectiles.The predictions are made by performing a detailed analysis comparing with the available experimental data.Furthermore,these elastic scattering observables are also predicted for some lighter targets outside of the given mass number range,and reasonable results are obtained.Possible physical explanations for the observed differences are also discussed. 展开更多
关键词 optical model potential elastic-scattering ANGULAR distribution TOTAL reaction CROSS SECTION
Microscopic study of 7Li-nucleus potential 认领
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作者 陈文棣 郭海瑞 +4 位作者 孙伟力 叶涛 应阳君 韩银录 申庆彪 《中国物理C:英文版》 SCIE CAS CSCD 2020年第5期106-113,共8页
A microscopic approach is employed to study the optical potential for the 7Li-nucleus interaction system without any free parameters.It is obtained by folding the microscopic optical potentials of the constituent nucl... A microscopic approach is employed to study the optical potential for the 7Li-nucleus interaction system without any free parameters.It is obtained by folding the microscopic optical potentials of the constituent nucleons of 7Li over their density distributions.We employ an isospin-dependent nucleon microscopic optical potential,which is based on the Skyrme nucleon-nucleon effective interaction and derived using the Green's function method,as the nucleon optical potential.The harmonic oscillator shell model is used to describe the internal wave function of 7Li and obtain the nucleon density distribution.The 7Li microscopic optical potential is used to predict the reaction cross-sections and elastic scattering angular distributions for the target range from 27Al to 208Pb and energy range below 450 MeV.Generally,the results can reproduce the measured data reasonably well.In addition,the microscopic optical potential is comparable to a global phenomenological optical potential by fitting the presently existing measured data. 展开更多
关键词 7 LI MICROSCOPIC optical POTENTIAL 7 LI elastic SCATTERING FOLDING model
New measurements and reanalysis of^14N elastic scattering on^10B target 认领
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作者 Marzhan Nassurlla N.Burtebayev +12 位作者 T.Kh.Sadykov I.Boztosun N.Amangeldi D.Alimov Zh.Kerimkulov J.Burtebayeva Maulen Nassurlla A.Kurakhmedov S.B.Sakuta Mesut Karakoc Awad A.Ibraheem K.W.Kemper Sh.Hamada 《中国物理C:英文版》 SCIE CAS CSCD 2020年第10期115-123,共9页
The angular distributions of elastic scattering of^14N ions on^10B targets have been measured at incident beam energies of 21.0 and 24.5 MeV.Angular distributions at higher energies 38–94.0 MeV(previously measured)we... The angular distributions of elastic scattering of^14N ions on^10B targets have been measured at incident beam energies of 21.0 and 24.5 MeV.Angular distributions at higher energies 38–94.0 MeV(previously measured)were also included in the analysis.All data were analyzed within the framework of the optical model and the distorted waves Born approximation method.The observed rise in cross sections at large angles was interpreted as a possible contribution of theα-cluster exchange mechanism.Spectroscopic amplitudes SA2 and SA4 for the configuration^14N→^10B+αwere extracted.Their average values are 0.58±0.10 and 0.81±0.12 for SA2 and SA4,respectively,suggesting that the exchange mechanism is a major component of the elastic scattering for this system.The energy dependence of the depths for the real and imaginary potentials was found. 展开更多
关键词 elastic scattering optical model potential DWBA method spectroscopic amplitudes
Formulation of Determining the Gravity Potential Difference Using Ultra-High Precise Clocks via Optical Fiber Frequency Transfer Technique 认领 被引量:1
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作者 Ziyu Shen Wen-Bin Shen +3 位作者 Zhao Peng Tao Liu Shougang Zhang Dingbo Chao 《地球科学学刊:英文版》 SCIE CAS CSCD 2019年第2期422-428,共7页
Based on gravity frequency shift effect predicted by general relativity theory, this study discusses an approach for determining the gravity potential(geopotential) difference between arbitrary two points P and Q by r... Based on gravity frequency shift effect predicted by general relativity theory, this study discusses an approach for determining the gravity potential(geopotential) difference between arbitrary two points P and Q by remote comparison of two precise optical clocks via optical fiber frequency transfer. After synchronization, by measuring the signal’s frequency shift based upon the comparison of bidirectional frequency signals from P and Q oscillators connected with two optical atomic clocks via remote optical fiber frequency transfer technique, the geopotential difference between the two points could be determined, and its accuracy depends on the stabilities of the optical clocks and the frequency transfer comparison technique. Due to the fact that the present stability of optical clocks achieves 1.6×10-18 and the present frequency transfer comparison via optical fiber provides stabilities as high as 10-19 level, this approach is prospective to determine geopotential difference with an equivalent accuracy of 1.5 cm. In addition, since points P and Q are quite arbitrary, this approach may provide an alternative way to determine the geopotential over a continent, and prospective potential to unify a regional height datum system. 展开更多
关键词 GRAVITY FREQUENCY shift OPTICAL fiber FREQUENCY TRANSFER OPTICAL CLOCK GRAVITY potential
基片表面倾斜及衍射对激光会聚原子沉积条纹的影响 认领
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作者 张宝武 张超超 +3 位作者 刘若男 王道档 沈小燕 余桂英 《中国计量大学学报》 2019年第4期457-462,共6页
目的:探究基片对激光会聚原子沉积的影响。方法:根据光学势阱中原子运动的轨迹方程,对会聚场的光学势阱、原子运动轨迹和沉积条纹等进行了仿真实验。结果:衍射式光学势阱使原子轨迹提前会聚,进而与倾斜角一起对沉积条纹的质量参数产生... 目的:探究基片对激光会聚原子沉积的影响。方法:根据光学势阱中原子运动的轨迹方程,对会聚场的光学势阱、原子运动轨迹和沉积条纹等进行了仿真实验。结果:衍射式光学势阱使原子轨迹提前会聚,进而与倾斜角一起对沉积条纹的质量参数产生了影响。在正倾时,随着|x0|的增大,条纹半高宽增大,条纹峰值减小;在负倾斜时,随着|x0|的增大,条纹半高宽保持不变,条纹峰值增大;同时随着|x0|的增大,沉积条纹的峰值位置相对于波节的偏移量趋向单调增大。在非衍射条件下,偏移量增大4 nm;在衍射条件下,偏移量增大15 nm。结论:由于衍射的存在,不管基片表面正倾斜还是负倾斜,基片表面上方沿着z方向都会存在一个直边衍射式的光学势阱。 展开更多
关键词 计量 激光会聚 光学势能 衍射 倾斜度
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用转移反应研究6He奇特核体系的光学势 认领
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作者 杨磊 林承键 +9 位作者 贾会明 马南茹 王东玺 杨峰 徐新星 孙立杰 温培威 钟福鹏 孙浩瀚 张焕乔 《原子能科学技术》 EI CAS CSCD 北大核心 2019年第10期1762-1772,共11页
由于受到放射性束强度弱、品质差的限制,奇特核体系的光学势性质一直是亟待解决的国际难题。本工作利用稳定束的转移反应作为探针,深入研究了反应出射道奇特核体系的光学势性质。利用中国原子能科学研究院的HI-13串列加速器在近库仑位... 由于受到放射性束强度弱、品质差的限制,奇特核体系的光学势性质一直是亟待解决的国际难题。本工作利用稳定束的转移反应作为探针,深入研究了反应出射道奇特核体系的光学势性质。利用中国原子能科学研究院的HI-13串列加速器在近库仑位垒能区高精度测量了7Li+63Cu、208Pb的弹性散射以及单质子转移反应角分布,并利用扭曲波玻恩近似(DWBA)和耦合反应道(CRC)方法对实验数据进行了拟合,抽取了出射道6He+64Zn、209Bi晕核体系的光学势参数。所得参数可重现文献中已有的6He体系的弹性散射角分布,验证了这种方法的可靠性。对所得势参数的能量相依性的分析表明,在重体系6He+209Bi中,基于因果律的色散关系并不适用,其潜在的物理原因还需进一步深入研究。 展开更多
关键词 奇特核体系 光学势 转移反应 色散关系
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Applicability of 9 Be global optical potential to reactions of 7,10,11,12Be 认领
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作者 徐永丽 韩银录 +3 位作者 梁海英 吴振东 郭海瑞 蔡崇海 《中国物理C:英文版》 SCIE CAS CSCD 2019年第9期55-61,共7页
Elastic scattering angular distributions and total reaction cross-sections of 7,10,11,12Be projectiles are predicted by the systematic 9Be global phenomenological optical model potential for target mass numbers rangin... Elastic scattering angular distributions and total reaction cross-sections of 7,10,11,12Be projectiles are predicted by the systematic 9Be global phenomenological optical model potential for target mass numbers ranging from 24 to 209.These predictions provide a detailed analysis by their comparison with the available experimental data.Furthermore,these elastic scattering observables are also predicted for some targets out of the mass number range.The results are in reasonable agreement with the existing experimental data,and they are presented in this study. 展开更多
关键词 global PHENOMENOLOGICAL optical model potential elastic scattering ANGULAR DISTRIBUTIONS total reaction cross SECTIONS
Optical Stark deceleration of neutral molecules from supersonic expansion with a rotating laser beam 认领
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作者 杨永成 侯顺永 邓联忠 《中国物理B:英文版》 SCIE EI CAS CSCD 2018年第5期187-193,共7页
关键词 分子能 激光 横梁 超声 旋转 减速 蒙特卡罗方法 高分辨率
Long term follow-up of a family with GUCY2D dominant cone dystrophy 认领
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作者 Georgios Tsokolas Hussein Almuhtaseb +4 位作者 Helen Griffiths Fatima Shawkat Reuben J.Pengelly Sarah Ennis Andrew Lotery 《国际眼科杂志:英文版》 SCIE CAS 2018年第12期1945-1950,共6页
AIM:To describe long term follow-up in a family with GUCY2D dominant cone dystrophy. METHODS:Optical coherence tomography scans and fundus autofluorescence images were obtained.Flash and pattern electroretinograms (ER... AIM:To describe long term follow-up in a family with GUCY2D dominant cone dystrophy. METHODS:Optical coherence tomography scans and fundus autofluorescence images were obtained.Flash and pattern electroretinograms (ERGs)and occipital pattern reversal visual evoked potentials were recorded. RESULTS:Two members of the same family (father and son)were identified to have the heterozygous R838C mutation in the GUCY2D gene.The father presented at the age of 45 with bilateral bull's eye maculopathy and temporal disc pallor.Over 13y of serial follow up visits,the bull's eye maculopathy progressed gradually into macular atrophy.Electrophysiological tests were significantly degraded suggesting poor macular function.Spectral-domain optical coherence tomography (SD-OCT)scans showed progressive loss and disruption of the ellipsoid layer at the foveal level.His son presented at the age of 16 with bilateral granular retinal pigment epithelial changes in both maculae.Electrophysiological testing was initially borderline normal but has gradually deteriorated to show reduced cone ERGs and macula function.SD-OCT demonstrated gradual macular thinning and atrophy bilaterally.Unlike his father,there was no disruption of the ellipsoid layer. CONCLUSION:Both family members exhibited gradual changes in their fundi,electrophysiological testing and multimodal imaging.Changes were milder than those observed in other mutations of the same gene. 展开更多
关键词 AUTOFLUORESCENCE ELECTRORETINOGRAM CONE DYSTROPHY cone-rod DYSTROPHY GUCY2D SPECTRAL-DOMAIN optical coherence tomography visual EVOKED potential
Parametrization of woods-saxon potential for heavy-ion systems 认领 被引量:1
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作者 Lin Gang ZhiHong Li +18 位作者 HuiBin Sun DanYang Pang Bing Guo YunJu Li Jun Su ShengQuan Yan ErTao Li YouB ao Wang Gang Lian ZhiYu Han XinYue Li DongHui Li TianLi Ma ChangJin Pei YangPing Shen Yi Su Sheng Zeng Yong Zhou WeiPing Liu 《中国科学:物理学、力学、天文学英文版》 SCIE EI CAS CSCD 2017年第8期28-34,共7页
Several elastic scattering angular distributions of ~(12)C from target nuclei of A ≥39 are analyzed to extract the Woods-Saxon potential parameters with the fixed imaginary potential and Coulomb radius parameters.Usi... Several elastic scattering angular distributions of ~(12)C from target nuclei of A ≥39 are analyzed to extract the Woods-Saxon potential parameters with the fixed imaginary potential and Coulomb radius parameters.Using the best fitted diffuseness parameters,the correlations of the real part parameters with A_1~(1/3)+ A_2~(1/3) and incident energy are revealed, and the systematic Woods-Saxon potential parameters are presented for nucleus-nucleus interaction.The proposed potential parameters can reproduce not only the elastic scattering angular distributions induced by ~(12)C,but also many elastic scattering angular distributions induced by the projectiles other than ~(12)C,thus providing important inputs for the study of nuclear reactions of heavy-ion systems. 展开更多
关键词 参数化 离子体 散射角分布 空间参数 扩散参数 最佳拟合 入射能量 相互作用
空心金属光纤导引原子和Monte-Carlo模拟 认领
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作者 赵连洁 严小军 +1 位作者 张国万 张安宁 《中国惯性技术学报》 EI CSCD 北大核心 2016年第6期809-814,共6页
在空心金属光纤,首先计算了TE01模的电磁场分布和光强分布。其次以^85Rb原子为例,计算了TE01模和^85Rb原子相互作用的光学势。研究表明,TE01模在空心金属光纤中集中分布在空心区,沿光纤截面呈环状分布。最后采用Monte-Carlo方法,分别模... 在空心金属光纤,首先计算了TE01模的电磁场分布和光强分布。其次以^85Rb原子为例,计算了TE01模和^85Rb原子相互作用的光学势。研究表明,TE01模在空心金属光纤中集中分布在空心区,沿光纤截面呈环状分布。最后采用Monte-Carlo方法,分别模拟了原子在直空心金属光纤和弯曲空心金属光纤中的直导引效率和弯曲导引效率,相比直导引方案,弯曲导引方案效率明显偏低。空心金属光纤原子导引不仅可用于原子干涉仪研究,采用环形空心金属光纤的原子导引还可用于角速度测量研究。 展开更多
关键词 原子导引 MONTE-CARLO模拟 空心金属光纤 导引效率 光学势
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Antiproton-nucleus reactions at intermediate energies 认领
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作者 Alexei Borisovich Larionov 《核技术:英文版》 SCIE CAS CSCD 2015年第2期104-110,共7页
Antiproton-induced reactions on nuclei at the beam energies from hundreds Me V up to several Ge V provide an excellent opportunity to study interactions between the antiproton and secondary particles(mesons, baryons a... Antiproton-induced reactions on nuclei at the beam energies from hundreds Me V up to several Ge V provide an excellent opportunity to study interactions between the antiproton and secondary particles(mesons, baryons and antibaryons) with nucleons. The antiproton projectile is unique in the sense that most of the annihilation particles are relatively slow in the target nucleus frame. Hence, the prehadronic effects do not much influence their interactions with the nucleons of the nuclear residue. Moreover, the particles with momenta less than about 1 Ge V/c are sensitive to nuclear mean field potentials. This paper discusses the microscopic transport calculations of the antiproton-nucleus reactions and is focused on three related problems:(i) antiproton potential determination,(ii) possible formation of strongly bound antiproton-nucleus systems, and(iii) strangeness production. 展开更多
关键词 原子核反应 反质子 能量 相互作用 次级粒子 核平均场 核系统 iii
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基片位置对激光会聚铬原子沉积的影响 认领 被引量:4
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作者 张宝武 张文涛 +1 位作者 王道档 余桂英 《光学学报》 EI CAS CSCD 北大核心 2014年第8期53-59,共7页
为了研究基片位置对激光会聚铬原子沉积的影响,基于原子的粒子运动,采用数值计算对基片切割会聚激光场不同部位时高斯激光驻波场光学势阱、原子运动轨迹和沉积条纹进行了仿真。研究结果充分显示了基片位置对上述三方面的影响。虽然基片... 为了研究基片位置对激光会聚铬原子沉积的影响,基于原子的粒子运动,采用数值计算对基片切割会聚激光场不同部位时高斯激光驻波场光学势阱、原子运动轨迹和沉积条纹进行了仿真。研究结果充分显示了基片位置对上述三方面的影响。虽然基片会对激光产生衍射,但是无论衍射存在与否,沉积条纹半峰全宽的最小值和中心峰值的最大值都出现在基片表面和激光中轴线重合的位置。此时,衍射将使条纹中心峰值降为非衍射时的0.96倍,同时,半峰全宽增加至非衍射时的1.03倍。另外,仿真结果显示,不管是否考虑衍射,垂直于激光中轴线方向(y方向)上沉积条纹的中心峰值随y值的增加呈现单调减小的趋势,而条纹半峰全宽随y值的增加呈现单调递增的趋势。 展开更多
关键词 衍射 激光会聚 光学势阱 铬原子
光晶格势阱中二元凝聚体的矢量孤子的振荡和分裂 认领
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作者 何章明 张志强 +1 位作者 朱善华 柳闻鹃 《物理学报》 SCIE EI CAS CSCD 北大核心 2014年第19期40-44,共5页
考虑外部囚禁势阱为光晶格势阱,研究了二元玻色-爱因斯坦凝聚体中亮-亮孤子的动力学行为.结果表明,亮-亮孤子的运动方向和振荡行为可以分别通过调节光晶格势阱的晶格常数和势阱深度来控制.进一步地,亮-亮孤子还可以被局域在光晶格势阱中... 考虑外部囚禁势阱为光晶格势阱,研究了二元玻色-爱因斯坦凝聚体中亮-亮孤子的动力学行为.结果表明,亮-亮孤子的运动方向和振荡行为可以分别通过调节光晶格势阱的晶格常数和势阱深度来控制.进一步地,亮-亮孤子还可以被局域在光晶格势阱中,并且随着势阱深度的增加,局域孤子会产生分裂行为. 展开更多
关键词 二元玻色-爱因斯坦凝聚 亮-亮孤子 光晶格势阱
光传感器场强法检测线路悬式瓷绝缘子串劣化绝缘子 认领 被引量:4
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作者 陈洪波 马剑辉 +6 位作者 夏景欣 冯运 黄道春 阮江军 王靖 段晓方 胡学秋 《武汉大学学报:工学版》 CAS CSCD 北大核心 2013年第2期217-222,共6页
输电线路绝缘子串存在劣化绝缘子时,绝缘强度下降,容易发生闪络,对电网安全构成严重威胁.在试验大厅中利用光传感器对220kV悬垂瓷绝缘子串良好和不同位置存在零值绝缘子时的电场分布进行了检测.并按照试验布置情况建立了三维静电场有限... 输电线路绝缘子串存在劣化绝缘子时,绝缘强度下降,容易发生闪络,对电网安全构成严重威胁.在试验大厅中利用光传感器对220kV悬垂瓷绝缘子串良好和不同位置存在零值绝缘子时的电场分布进行了检测.并按照试验布置情况建立了三维静电场有限元模型,仿真分析了绝缘子串电场分布.试验数据和仿真结果对比表明:伞裙使绝缘子的电场分布极不均匀,电场最小值出现在伞裙中;良好绝缘子串周围的合成场强呈近似U形分布.零值绝缘子对应位置处的电场分布在局部出现明显下降.不论零值绝缘子出现在高压端、低压端,还是中部,都能通过电场测量结果表现出来,可为电场法检测劣化绝缘子提供参考. 展开更多
关键词 光传感器 绝缘子 劣化 零值 电位分布 电场分布
非局域光学格子中光束传输的变分研究 认领 被引量:4
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作者 白东峰 王毅 华显立 《激光与光电子学进展》 CSCD 北大核心 2013年第11期155-160,共6页
从理论上分析了在强非局域非线性光学格子中的光束传输特性。在强非局域克尔介质中通过实对称响应函数的泰勒展开,得到非线性薛定谔方程的简化了的拉格朗日密度,运用变分法,得出光束的束宽、振幅、相位等各个参量的演化方程。把光束... 从理论上分析了在强非局域非线性光学格子中的光束传输特性。在强非局域克尔介质中通过实对称响应函数的泰勒展开,得到非线性薛定谔方程的简化了的拉格朗日密度,运用变分法,得出光束的束宽、振幅、相位等各个参量的演化方程。把光束看作等效粒子,通过对势函数的分析,得出形成格子孤子的临界功率。改变格子结构的周期、调制深度等参数,可以实现对孤子传输的控制,这在研究可控全光开关等方面具有潜在的应用价值。 展开更多
关键词 非线性光学 非局域非线性克尔介质 光学格子 变分法 势函数
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