,Effects of transverse profile of pump field on second harmonic generation in periodic nonlinear mat

来源 :中国物理(英文版) | 被引量 : 0次 | 上传用户:ychhe123yang
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
We report on a theoretical analysis of the effects of a converging pump field of Gaussian transverse profile on second harmonic generation in a periodic nonlinear material with quasi-phase-matching. The outputs of the centre intensity and the intensity flux for second harmonic generation are derived by simulation, based on the parameters of quasi-phase-mismatch, the waist and focus positions of the input pump beam. The results show that when the transverse profile of the pump field is taken into account, the quasi-phase-match value and focus position of input beam for maximal second harmonic generation follow new criteria.
其他文献
Based on a force constant model, we investigated the phonon spectrum and then specific heat of single-walled boron nitride nanotubes. The results show that the
Dependence of the bootstrap current fraction of spherical torus plasma on the aspect ratio and the triangular deformation is studied by using a simple equilibri
自2004年秋季开始全面实施新课程改革,至今已三年有余,就新课程亮点与难点之一的综合实践活动课程开展而言,经过各校师生的携手努力,大胆实践,“摸着石子过河”,确实取得了一
Our theoretical study on UH2+(X4∑) using a density functional method shows that its potential energy curve has both minimum and maximum, which is the so-called
Basic shock phenomena are presented in a composite pinch, a hybrid of the Z-pinch. The successive transfer of current within the plasma structure is demonstrate
We show how a CNOT gate and single-qubit rotation can be implemented non-locally. We also report on thequantitative relations between these quantum actions, ent
This paper deals with the numerical simulation of gas-solid two-phase flows in an Eulerian-Lagrangian scheme.The particle tracks are calculated using a recently
In this paper we discuss the reality conditions for Lorentzian and Euclidean gravity in the Ashtekar formulation by introducing a double conformal transformatio
We present the theoretical investigation of spontaneous magnetization of a coupled 2 × 2 π ring array. It is indicated by free energy calculation that the sys
We have studied the dynamical behaviours of two electrons confined in a double quantum dot driven by rotating magnetic fields in terms of the theory of Lewis-Ri