【摘 要】
：
Recently, fundamental properties and practical applications of two-dimensional (2D) materials have attracted tremendous interest. Micro/nanostructures and functional devices in 2D materials have been fabricated by various methods. Ultrafast direct laser w
【机 构】
：
CentreforTranslationalAtomaterials,FacultyofScience,EngineeringandTechnology,SwinburneUniversityofTe
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
Recently, fundamental properties and practical applications of two-dimensional (2D) materials have attracted tremendous interest. Micro/nanostructures and functional devices in 2D materials have been fabricated by various methods. Ultrafast direct laser writing (DLW) with the advantages of rich light-matter interactions; unique three-dimensional processing capability; arbitrary-shape design flexibility; and minimized thermal effect, which enables high fabrication accuracy resolution, has been widely applied in the fabrication of 2D materials for multifunctional devices. This timely review summarizes the laser interactions with 2D materials and the advances in diverse functional photonics devices by DLW. The perspectives and challenges in designing and improving laser-fabricated 2D material photonic devices are also discussed.
其他文献
Coupled dark-bright vector solitons are considered in a birefringent fiber, and their dynamics are studied by the variational approach. The stationary states are analyzed, and it is found that their intensity distribution depends strictly on the ratio of
We proposed a new scheme of controlling second-harmonic generation by enhanced Kerr electro-optic nonlinearity. We designed a structure that can implement the cascaded Pockels effect and second-harmonic generation simultaneously. The energy coupling betwe
将局部学习算法引入到种子的近红外高光谱图像最优波段选择中，并建立偏最小二乘判别分析分类预测模型，实现少波段条件下的玉米种子的快速鉴选。实验共采集了6 类样本共720 粒的玉米种子在874~1734 nm 波段范围内的256 幅近红外高光谱图像，利用局部学习算法获得波段的特征权重，并依据特征权重选择了最优波段。实验结果表明局部学习算法可有效获取最优鉴选波段，在13 个最优波段条件下，对6 组玉米种子可以获得平均纯度为95.97%的鉴选结果，为实现玉米种子的快速鉴选提供了一个合适的技术途径。
对UV-TEA CO2激光气体采用催化循环的方法,成功地使激光器运转次数从原来的500次提高到10万次以上。
本文采用麦克斯韦(Maxwell)方程微分积分方程对波长尺寸的梯形反射光栅在TE模式(横向电场)偏振状态入射下,进行严格理论的计算和分析.表面电场计算表明,光栅刻槽斜边边界对于金属材料金和铝光栅表面电场分布具有明显效应,对于入射波长为λ=1.0 μm附近的红外区域,金材料具有强烈的金属特性,此时表面电场的斜边边界效应更加明显.表面电场及其远场衍射效率伴随刻槽深度变化,而振荡特性进一步阐明了此效应对近,远场的作用.该方程适用于任意形状光栅或单一散射体对任意入射方向,任意偏振态的衍射和散射问题.
为了有效减小光腔衰荡光谱仪中光腔的体积,设计了一种Z型折叠腔结构,其外部尺寸仅为26.4 cm×8.5 cm×4.5 cm,展开的光腔长度为73.8 cm。采用傍轴高斯光束传输方程对实验光路进行仿真,通过调节两个凸透镜的焦距和位置,实现了光腔内激光模式与光腔模式的完美匹配,确保激光在腔内以横基模TEM00模式存在。实验中,采用数字延迟脉冲发生器触发声光调制器,开断激光,并高速采集衰荡信号,验证了所设计的折叠腔在光腔衰荡光谱仪上应用的可行性。对实验数据进行指数拟合,所得最大残差不超过0.004 μW,衰荡时
Hard coatings are extensively required in industry for protecting mechanical/structural parts that withstand extremely high temperature, stress, chemical corrosion, and other hostile environments. Electrical discharge coating (EDC) is an emerging surface
提出了一种基于球面晶体的高光谱分辨全视场X射线荧光成像仪,并分析了该成像系统的空间分辨率、视场、能谱带宽、荧光收集效率。根据理论分析设计了一套用于V~Zn等典型中等原子序数金属的Kα线荧光成像系统,并采用解析的理论和本课题组编写的蒙特卡罗光线追迹程序对该系统性能进行了计算和仿真。理论分析和数值仿真的结果表明,这种X射线荧光成像技术具有较高的空间分辨率(优于80 μm)、较大的视场(大于6.5 mm)以及极高的光谱(能谱)分辨率(优于16.5 eV@4.6~9 keV)。
一种强大的激光系统的样机装置的设计已由劳伦斯利弗莫尔实验室的大型计算机制定，美国希望利用它来检验通过激光引发的重氢原子聚变产生大量电能的可能性。