Transmission and TransFormation of Gaussian Laser Beam through Optical Systems of the Complex-matrix Elements

本文导出矩阵元为复数的光学系统输出空间高斯光束参数普遍运用的计算公式，讨论了含有高斯孔径的傅里叶变换系统和梯度折射率系统的先学传递矩阵，文中给出这些系统的光束变换式系列，表明衍射角（λ/πω＿g）是高斯孔径的衍射效应因数。The general useFul calculating Formulas For the Gaussian beam parameters of output space of optical systems with complex-matrix elements are derived in this paper.Optical transFer matrices of the Fourier transForming system and the GRIN system in the presence of Gaussian aperture are discussed.And a.series of thransForm Formulas of these systems are glven.These Formulas show that the diFFractive angle(λ/πω_g)is the Factor of diFFracting eFFect For Gaussian aperture.福建省自然科学基

Growth mechanism of large-size anthracene single crystals grown by a solution technique

<font face="times new roman,times" size="2">Large-size and high-quality anthracene single crystals have been grown by a solution technique. The size of crystals reaches 2.2 cm and the crystals with rhombic plane have been obtained for the first time. FTIR and Raman analysis indicate that the crystals did not incorporate the solvent at the detection level. XRD analysis indicates that the anthracene single crystals have good quality. The morphology of surface and transect of anthracene single crystals was observed by optical microscope, atomic force microscope (AFM), and scanning electron microscope (SEM). Anthracene monolayers and the array of large straight steps were observed on the surface of anthracene single crystals. Layer-like structure was also observed in the interior of single crystals. All results indicate that the growth mechanism of anthracene single crystals is a two-dimensional nucleation-elementary steps-large straight steps-layer-by-layer periods growth.</font