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Structural and electronic properties of a bistable redox-responsive molecular switch based on dibenzo[1,2]dithiine (PSBH) were studied using the DFT-B3LYP/6-31G* method. The results confirmed that the electrical conductivity of the closed form of considered molecular switch is higher than that of the open form. NBO electric charges on heavy atoms of biphenyl unit revealed that the positive charge on sulfur atoms reinforced, which caused the collapse of disulfide bond. 相似文献
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The far-field properties and beam quality of vectorial nonparaxial Hermite–Laguerre–Gaussian (HLG) beams are studied in detail, where, instead of the second-order-moments-based M2 factor, the extended power in the bucket (PIB) and βparameter are used to characterize the beam quality in the far field and the intensity in the formulae is replaced by the z component of the time-averaged Poynting vector Sz. It is found that the Sz PIB and βparameter of vectorial nonparaxial HLG beams depend on the mode indices n, m, αparameter and waist-width-to-wavelength ratio w0/λ and the PIB and βparameter are additionally dependent on the bucket's size taken. 相似文献
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基于矢量Rayleigh-Sommerfeld衍射积分,推导出矢量非傍轴圆偏振厄米-拉盖尔-高斯(HLG)光束的远场解析表达式.矢量非傍轴圆偏振高斯光束可作为一般公式的特例给出.将桶中功率(PIB)概念推广到非傍轴范畴,用以描述矢量非傍轴光束的远场光束质量,其中光强用时间平均坡印廷矢量的z分量取代.数值计算和分析表明,矢量非傍轴HLG光束的PIB不仅与束腰宽度与波长之比w0/λ有关,而且还与α参数,模指数n和m以及所取桶的尺寸有关.
关键词:
矢量非傍轴厄米-拉盖尔-高斯光束
矢量Rayleigh-Sommerfeld衍射积分
桶中功率 相似文献
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