The features and applications of the surface plasmon of metal nanoparticles near the interface

随着微加工技术和纳米技术的迅速发展，表面等离子体技术在光电子器件的微型化和集成化上得到了广泛应用，受到了物理、化学、生物、以及医学等多个领域人士的极大关注。局域表面等离子体(LSPs)由于具有独特的传播、激发、以及表面电磁场的局域增强特性，使得其在各个领域的应用有着显著的优势。因此，对纳米颗粒制备及局域表面等离子体激元共振特性及其应用进行研究具有十分重要的意义。本论文工作分成以下两个内容 1、基于LSP的非对称反射光学特性的机理研究 我们在实验上发现当光分别从Au纳米颗粒一侧入射和从SiO2衬底一侧入射存在非对称反射现象，从Au纳米颗粒一侧入射时，在LSP共振波长附近出现为高反射，而从Si...With the rapid development of micro-machining technology and nanotechnology, surface plasmon technology has been widely used in optoelectronic devices on miniaturization and integration, and has been concerned in many fields, such as physics, chemistry, biology, medicine, and so on. Localized surface plasmons (LSPs) has an significant advantage of application in various fields because of the uniqu...学位：工学硕士院系专业：物理与机电工程学院_微电子学与固体电子学学号：1982011115285

The Applications of Localized Surface Plasmon in Optoelectronic Devices

随着微加工技术和纳米技术的迅速发展,表面等离子体技术在光电子器件的微型化和集成化上得到了广泛应用,受到了物理、化学、生物、以及医学等多个领域人士的极大关注。局域表面等离子体(lSPS)由于具有独特的传播、激发、以及表面电磁场的局域增强特性,使得其在各个领域的应用有着显著的优势。文章叙述了lSP的相关特性及影响其共振频率的几个因素。分析了lSP在光伏电池、光电探测器和发光二极管(lEd)等领域的应用,包括最近几年所取得的一些重要进步,并着重介绍了我们小组近期在这些方面研究所取得的成果。With the rapid development of micro- machining technology and nanotechnology,surface plasmon technology has been widely used in optoelectronic devices on miniaturization and integration,and has been concerned in many fields,such as physics,chemistry,biology,medicine,and so on.Localized surface plasmons( LSPs) has an significant advantage of application in various fields because of the unique properties of propagation,excitation and localized surface electromagnetic field enhancements.This paper we present a brief description of the relevant characteristics of the LSP and the factors that affect its resonant frequency.And then we introduce the applications LSP in photovoltaic cells,photodetectors,light- emitting diode( LED) and other areas,and highlight the achievements that our team achieved in these areas recently.国家自然科学基金青年基金项目(项目编号:61108064

Characteristics and Gas Sensing Properties of ZnO Thin Films Doped by Dy~(3+) and La~(3+)

采用真空蒸发的方法制备了掺杂原子比为3%、5%和9%的lA掺杂和dy掺杂的znO薄膜.用扫描电子显微镜(SEM)、X射线衍射(Xrd)谱和X射线光电子能谱(XPS)表征了所制得的znO薄膜的特性.发现所有薄膜都沿C轴取向优先生长.在对znO薄膜气敏特性的测量中,在低温条件下掺杂znO薄膜的电阻比非掺杂znO薄膜的小,且对乙醇和丙酮的灵敏度显著增强,且其中dy掺杂的znO薄膜的气敏特性较lA掺杂的znO薄膜为高.而空气中暴露9个月后的薄膜的气敏特性表明掺杂znO薄膜具有很好的稳定性.同时讨论了气敏传感机制和掺杂行为对薄膜灵敏度的影响.La and Dy-doped ZnO thin films were prepared via vacuum evaporation method at mass fraction of 3%,5% and 9% dopi ng.The obtained films were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).The results indicated that all films showed a preferred C-axis growth orientation.Compared with undoped ZnO thin films,the doped films exhibited a downshift of resistance at a low temperature and remarkable increase of sensitivity to ethanol and acetone vapour,and the sensitivity of Dy-doped ZnO thin films were higher than the sensitivity of La-doped ZnO thin films.The films were then exposed bare in air for 9 months and the sensitivity was remeasured.All the films remained the sensitivity at a high level which indicated an excellent stability.The sensing mechanism and the effect of doping behaviour were also discussed.国家重点基础研究发展计划(973)项目(2011CB301905;2012CB619301); 国家自然科学基金项目(61108064;61227009); 中央高校基本科研业务费专项(2010121056

氧离子与氖原子碰撞转移电离过程研究

采用位置灵敏探测和散射离子 反冲离子飞行时间测量技术,测量了氧离子与氖原子碰撞过程中转移电离截面与单电子俘获截面之比。通过比较,发现测量结果与文献结果的趋势一致,并对测量结果进行了解释

氧离子与氦、氖原子碰撞中转移电离过程的研究

采用位置灵敏探测和散射离子 反冲离子飞行时间测量技术,测量了氧离子与氖和氦原子碰撞过程中转移电离截面与单电子俘获截面之比。通过比较发现测量结果与文献结果的趋势一致,并对测量结果进行了讨论

普定喀斯特生态系统观测研究站的生物样地建设与监测工作

生长和适应于喀斯特地貌环境的生态系统,即喀斯特生态系统,因人类活动干扰和石漠化进程影响,其结构和功能均发生退化,因此,定位、长期监测喀斯特生态系统的组成、结构、过程和功能,以及人类活动的影响和响应,对研究该类特殊生态系统的格局和动态变化具有重要意义。作为中国科学院生态系统观测网络(CERN)仅有的两个喀斯特台站之一,普定喀斯特生态系统观测研究站的生物监测总目标是开展喀斯特高原常绿落叶阔叶混交林的植被生态学(结构、过程、功能)监测与研究,及其退化植被的恢复生态学示范,建立喀斯特植被恢复与重建的优化模式和范式。本文初步介绍了普定站的生物观测网络,以普定县后寨河流域的天龙山常绿落叶阔叶混交林样地作为永久监测样地(主观测场),以陈旗不同干扰方式下的植被恢复样地、赵家田皆伐样地、沙湾主站址退耕样地作为辅助监测样地(辅观测场),以高羊河流域陈家寨坡耕地恢复和滇柏林改造样地作为生态重建示范样地(辅观测场),配合流域内外诸多样地与试验点(站区调查点),可初步定位监测和预测代表性喀斯特森林和灌丛的长期变化与未来发展趋势

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel