《光子学报》征稿简则

正一、征稿范围1、研究论文:以光子学、光学及其相关理论技术为主体、具有领先水平或创新意义的学术论文,具有数据详实、结果可信且有实用意义的实验报告,具有国内外先进水平的应用技术文章、阶段性科研成果的研究简     

用微元法推导无阻尼单摆运动任意角度下的周期公式

对单摆运动进行了讨论。通过对单摆进行能量分析,得出了单摆角频率与角度的关系式,然后运用微元法,推导出了单摆的理论周期公式。计算结果表明,所得到的单摆运动周期的理论公式与展开公式符合得很好。     

3D shape measurement of larger complex objects based on fringe cycle correction

The grating fringe on the reference plane is broadened in the intersecting axis system because of oblique-angle projection. In order to solve this problem, we study the theoretical model of the temporal phase unwrapping method based on the fringe cycle correction. We also study the 3D shape measurement theoretical model of the larger complex objects after considering the coordinate deviation and lens distortion. Experimental results demonstrate that the fringe cycle on the reference plane can be corrected to a constant value, the lens distortion can be corrected, and 3D shape of larger complex objects can be accurately measured.     

奥普光电在大口径平面镜光学加工取得突破

正近日,中科院长春光学精密机械与物理研究所投资的奥普光电公司加工完成了直径为700mm的BZPMJ700标准平面镜。这标志着奥普公司在大口径平面镜光学加工技术上取得重大突破。该BZPMJ700标准平面镜由平面反射镜和精密二维支撑架两部分组成。面形精度为:PV=0.187λ、RMS=0.018λ、P     

周期射流冲击下导流板流动换热特性数值研究

本文对被动隔热导流板在周期射流冲击环境下的流场特性及热响应特性进行三维数值研究,分析了射流喷管与导流板间距、导流板水平倾角及轴向倾角三个参数的影响规律。研究结果表明射流空气冲击到导流板后90%的气流被向上侧及前后两侧偏导,导流板的水平倾角越大则气流向上侧偏导能力越弱,轴向倾角的存在可实现对气流前后侧导流流量的分配。导流板耐热层温度在进入第四个射流周期后呈现稳定周期波动,射流冲击距离越小、导流板水平倾角越大则其板面温度水平越高。     

Coherent Destruction of Tunneling of Dipolar Bosonic Gas

The tunneling dynamics of a dipolar bosonic gas with repulsive interactions in a periodically driven triple- well are investigated. Because of the coupled effect of long-range dipole-dipole interaction and the short-range of on-site interaction, the increase of the repulsive atomic interactions can either suppress tunneling or enhance tunneling and, thus, the system experiences rich coherent tunneling（CT）-coherent destruction of tunneling （CDT） transitions. In particular, as the repulsive atomic interactions increase, the system can undergo CT-CDT-CT- CDT or CDT-CT-CDT-CT-CDT transitions. This cannot occur in non-dipolar gas, where the increase of the repulsive atomic interaction only suppress tunneling and the system can only undergo CT-CDT transition. We further present a good understanding of the results with the help of the quasi-energy spectrum of the system.     

Collective Excitation and Quantum Depletion of a Bose-Einstein Condensate in a Periodic Array of Quantum Wells

With the help of a set of exact closed-form solutions to the stationary Gross–Pitaevskii （GP） equation, we calculate the collective excitation and quantum depletion of a weakly interacting Bose gas in the presence of a periodic array of quantum wells. The excitation spectrum （Bogoliubov spectrum） is obtained from the solution of the linearized time-dependent GP equation, which develops energy bands hωj（ p） periodic in quasi-momentum space. Moreover, we calculate the excitation strengths Zj（ p） relative to the density operator and then the dynamic structure factor S（ p,ω）. Accordingly, the analytical expressions of quantum depletion of the system are obtained. We find that the quantum depletion is enhanced when the interatomic interactions become larger and the potential is sufficiently deep. The conditions for the possible experimental realization of our scenario are also proposed.     

Dressed Dark Solitons of the Defocusing Nonlinear Schrodinger Equation

The nonlinear Schrodinger equation is proved to be consistent-tanh-expansion （CTE） solvable. Some types of dark soliton solutions dressed by cnoidal periodic waves are obtained by means of the CTE method.     

Interactions between Solitons and Cnoidal Periodic Waves of the Gardner Equation

The Gardner equation is one of the most important prototypic models in nonlinear physics. Many scholars pay much attention to the Gardner equation and various nonlinear excitations of the Gardner equation have been found by many methods. However, it is very difficult to find interaction solutions among different types of nonlinear excitations. In this work, with the help of the Riccati equation, the Gardner equation is solved by the consistent Riccati expansion. Furthermore, we obtain the soliton-cnoidal wave interaction solutions of the Gardner equation.     

环套小球在复合场中运动规律研究

先讨论了带电体在复合场中做部分圆周运动时,其速率与加速度大小的变化分别满足何种规律,以及如何求解它们的值;然后,先分析带电体的运动周期与哪些因素有关,进而给出周期的表达式。