从全息屏幕对投影物镜出瞳象(即视觉区域)的形成及该出瞳象对高斯象的偏离出发,研究了三维全息屏幕的象差特性。
We report a novel nonresonant magneto-optical effect in cold atoms and present the optimized parameters of the biased magnetic field, the incident probe light intensity, and the probe detuning to obtain the maximal signal of the magneto-optical rotation.
The response time and transmittivity of the magnetic fluid (MF) for different concentrations at room temperature were investigated in this letter. The volume fraction of the investigated sample ranged from 0.44% to 6.47%. It was found that the transmittiv
计算了在惰性稀释气体中Xe~ Cl~-M→XeCI~* M反应的复合速率(M=He,Ne,Ar).结果表明,室温时在稀释气体Ar,Ne,He中的复合速率在2atm,6.5atm,17atm时分别达到最大值2.4cm~3sec~(-1),2.5cm~3sec~(-1),3.3cm~3sec~(-1),结果还表明,在气体密度一定时,复合速率随温度的上升而急剧地减小.
Q开关Nd:YAG激光器已被用以使复盖蒸发Ge薄膜的n-GaAs上形成欧姆接触。这种接触显示了良好的表面形态,其接触电阻率低到10-6欧姆·厘米。
量子级联(QC)激光器是唯一能在室温产生中红外辐射的半导体激光器。它的宽调谐范围、高输出功率和单模工作的特性,使得它非常适用于高分辨率光谱分析。结合中红外光谱区是气体分子的基频强吸收特性,基于室温脉冲工作的量子级联激光器的吸收光谱检测技术以其灵敏度高、选择性强及响应快速等特点,成为痕量气体探测的有效方法。介绍了基于分布式量子级联激光器的脉间光谱技术,通过分析比较不同工作参数下的激光光谱信号,寻求最佳的激光器工作参数,并且在选定的工作参数下对目标气体的吸收谱线进行测量,得到了中心在2178.2cm-1附近的
We report a double
Q-switched 946 nm laser with a magnesium-oxide-doped
LiNbO
Semiconductor lasers, an important subfield of semiconductor photonics, have fundamentally changed many aspects of our lives and enabled many technologies since their creation in the 1960s. As in other semiconductor-based fields, such as microelectronics,