【摘 要】
：
In a novel generation and detection configuration of terahertz (THz) radiation, we investigate experimentally and numerically the properties of sub-cycle THz pu
【机 构】
：
Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese
论文部分内容阅读
In a novel generation and detection configuration of terahertz (THz) radiation, we investigate experimentally and numerically the properties of sub-cycle THz pulses in the near field. It is found that the sub-cycle THz pulses experience significant spectral and temporal deformation in the near-field zone. The variations of both the pulse waveform and spectral distribution of the THz electric field are clearly observed in our experiments when the spot size of source is changed. Numerical simulations based on Gaussian distribution are performed to explain the details of the data and lead to an excellent agreement with the experimental results.
其他文献
随着社会的不断发展,我们在教学中也越来注重学科教学的有效性,而阅读作为初中英语教学的重要内容,更需要提升教学的实际效果.为此,作为初中英语教师的我们,应善于抓住机遇,
随着我国经济发展进入了一个新的阶段,国家对于高质量人才的需求也越来越大.小学是学生教育的起步阶段,对学生未来发展具有重要的作用.因此,在小学英语教学中更多地添加生活
随着全球经济一体化,英语作为国际语言其地位随着经济发展也越来越高,英语的国际地位日渐重要.因此,随着教育改革的不断深化,教育改革对高中英语教学提出了更高的标准.尽管随
众所周知,作业设计是小学英语教学中不可或缺的一个环节,其同样是培养学生英语核心素养的主要途径.在核心素养的指导下,教师要打破传统作业设计的限制,立足教学内容和学生的
元胡栽培中霜霉病发病较重,一般采用农药防治。我们从激素防病增产的报道中得到启示,选择发病较重的地块,喷施GA_3及生长调节剂“802”。现将试验总结如下。一、试验方法设
The horizon area spectrum of a stationary axisymmetric Einstein-Maxwell Dilaton-Axion (EMDA) black hole is studied by using Gour-Medveds method. It is found tha
We report a comparative study on photo-crystallization in a-Se95 Te5 and a-Se95In5 alloys. The photo-crystallization is achieved by a shining white line on the
Yb3+-doped new gallium-lead-germanate glass is presented. Thermal stability, spectroscopic and laser performance parameters of the Yb3+-doped new gallium-lead-g
在英语教学中,阅读教学是一个重要的方面.通过阅读,不仅能够扩大学生的知识面,增加单词储备含量明确语法等,而且还能有效地提高学生在相关能力上的培养.鉴于此,如何通过阅读
此次研究将重点结合我国外研社join in(三年级起点)的六年级上册教材中第一单元的内容进行分析与论述.并且会依据Unit 1“School is great fun!”Period 1中的相关内容对六年