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通过综合"菲涅尔双棱镜测量钠黄光波长"、"分光计"、"等厚干涉"等实验中的几何光学和干涉光学的方法实现了对菲涅尔双棱镜折射率n,楔角α的测量,并提出了一种非接触测量厚度的方法,即用统计方法间接测量了双棱镜的厚度h.另外此种方法指出了"菲涅尔双棱镜测量钠黄光波长"实验虚光源与狭缝位置的不同,对实验系统误差的修正有一定参考意义. 相似文献
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Ground state of rotating ultracold quantum gases with anisotropic spin orbit coupling and concentrically coupled annular potential
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Motivated by recent experimental realization of synthetic spin–orbit coupling in neutral quantum gases, we consider the quasi-two-dimensional rotating two-component Bose–Einstein condensates with anisotropic Rashba spin–orbit coupling subject to concentrically coupled annular potential. For experimentally feasible parameters, the rotating condensate exhibits a variety of rich ground state structures by varying the strengths of the spin–orbit coupling and rotational frequency.Moreover, the phase transitions between different ground state phases induced by the anisotropic spin–orbit coupling are obviously different from the isotropic one. 相似文献
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We present a theoretical study on the electric field driven plasmon dispersion of the two-dimensional electron gas(2DEG)in AlGaN/GaN high electron mobility transistors(HEMTs).By introducing a drifted Fermi–Dirac distribution,we calculate the transport properties of the 2DEG in the AlGaN/GaN interface by employing the balance-equation approach based on the Boltzmann equation.Then,the nonequilibrium Fermi–Dirac function is obtained by applying the calculated electron drift velocity and electron temperature.Under random phase approximation(RPA),the electric field driven plasmon dispersion is investigated.The calculated results indicate that the plasmon frequency is dominated by both the electric field and the angle between wavevector and electric field.Importantly,the plasmon frequency could be tuned by the applied source–drain bias voltage besides the gate voltage(change of the electron density). 相似文献
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使用一次成像法和二次成像法对双棱镜测钠黄光波长实验的实验数据进行处理,指出虚光源所成实像的测量对波长测量的不确定度贡献最大;之后进行了误差分析,并将一次成像法和二次成像法相结合,用二次成像的共轭性对源像距离进行修正,可以提高实验的准确度,实验结果得到了较好的改进. 相似文献
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