用线偏振光产生椭圆（或圆）偏振光的另两种方法

给出用线偏振光产生椭圆（或圆）偏振光的另两种方法.     

棒球中的物理学

 在棒球运动风糜全球的今天,物理学工作者当然不会满足于能够解释为什么天空是蓝色的以及为什么星星会闪烁等诸如此类的现象.与乒乓球和网球的情形类似,空气动力学原理在棒球中起着重要的作用.然而,棒球是由一块块的皮革缝合而成,既不能看成是理想的光滑球体,也不可作为极端粗糙的球体来对待.     

薄膜干涉光程差公式推导过程中的近似问题

给出等倾干涉的光程差公式可推广至等厚干涉的证明.     

大学物理双语教学实践与研究

大学物理是国内外理工科大学基础课中非常重要的一门课程.开展和推进双语教学工作是高等教育国际化的重要内容之一.大学物理学教学模式的改革是教学改革的主要内容之一.笔者在大学物理教学中,选用英文原版优秀教材与中文教材相结合的新颖的双语教学模式,教学与国际接轨,激发学生学习兴趣,培养学生综合创新能力,提高学生科学素养.文章结合我校非物理专业"大学物理"双语教学的实际情况,介绍大学物理双语教学目的、研究方法和具体措施;客观评价了大学物理双语教学效果.     

Structural and optical properties of tungsten-doped vanadium dioxide films

Thin films of tungsten(W)-doped thermochromic vanadium dioxide(VO2) were deposited onto soda-lime glass and fused silica by radio frequency magnetron sputtering.The doped VO2 films were characterized by X-ray diffraction,optical transmittance measurement,and near field optical microscopy with Raman spectroscopy.X-ray diffraction patterns show that the(011) peak of W-doped thermochromic VO2 film shifts to a lower diffraction angle with the increase of W concentration.The optical measurements indicated that the transmittance change(△T) at wavelength of 2500 nm drops from 65%(T at 35℃ and 80℃ for undoped VO2 film) to 38%(T at 30℃ and 42℃ for the doped VO2 film).At the same time,phase transition temperature drops from 65℃ to room temperature or lower with the increase of W concentration.Near field optical microscopy image shows that the surface of W-doped VO2 film is smooth.Raman results show that the main Raman modes of W-doped VO2 are centered at 614 cm1,the same as that of undoped VO2,suggesting no Raman mode changes for lightly W-doped VO2 at room temperature,due to no phase transition appearing under this condition.     

布儒斯特角的测量方法

基于布儒斯特定律和马吕斯定律,利用偏振片的巧妙组合,实现了对介质布儒斯特角和折射率的精确测量.     

In-situ characterization of electrochromism based on ITO/PEDOT:PSS towards preparation of high performance device

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) is usually sandwiched between indium tin oxide(ITO) and a functional polymer in order to improve the performance of the device. However, because of the strong acidic nature of PEDOT:PSS, the instability of the ITO/PEDOT:PSS interface is also observed. The mechanism of degradation of the device remains is unclear and needs to be further studied. In this article, we investigate the in-situ electrochromism of PEDOT:PSS to disclose the cause of the degradation. X-ray photoelectron spectroscopy(XPS) was used to characterize the PEDOT:PSS films, as well as the PEDOT:PSS plus polyethylene glycol(PEG) films with and without indium ions. The electrochromic devices(ECD) based on PEDOT:PSS and PEG with and without indium ions are carried out by in-situ micro-Raman and laser reflective measurement(LRM). For comparison, ECD based on PEDOT:PSS and PEG films with LiCl, KCl, NaCl or InCl_3 are also investigated by LRM. The results show that PEDOT:PSS is further reduced when negatively biased, and oxidized when positively biased. This could identify that PEDOT:PSS with indium ions from PEDOT:PSS etching ITO will lose dopants when negatively biased. The LRM shows that the device with indium ions has a stronger effect on the reduction property of PEDOT:PSS-PEG film than the device without indium ions. The contrast of the former device is 44%, that of the latter device is about 3%. The LRM also shows that the contrasts of the device based on PEDOT:PSS+PEG with LiCl, KCl, NaCl, InCl_3 are 30%, 27%, 15%, and 18%, respectively.     

突出文化特色的大学物理教学模式

大学物理学教学模式的改革是教学改革的主要内容之一。对理工科大学非物理专业的学生来说,"大学物理学"本身的学科角色已不是那么突出,物理学中的思维方法和哲学等文化的学习变得比物理知识本身更重要。作者在大学物理教学中,尝试突出物理学文化特色的教学模式,激发学生学习兴趣,培养学生跨学科思考的能力,提高学生科学素养。通过大学物理学的教与学,帮助学生养成良好的文化修养和创新精神。