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关于举行新加坡南洋理工大学熊启华教授学术报

日期:2019-05-05编辑作者:关于365

2018年3月20日

难点: Probing Light-马特er Interactions in Polar Semiconductor Materials报告人:楚肃王华 教师(俄亥俄州立大学)主持人:李志远距离教育授时间: 20壹七年1月11日(礼拜六)10:00地址: 物理楼(18号楼)二楼二一三室学术报告厅迎接广大师生加入!物理与光电高校前年五月217日附属类小部件:报告标题:Probing Light-马特er Interactions in Polar Semiconductor Materials内容摘要:The interaction of light with matter gives rises to a wide range of linear and nonlinear phenomena that we are familiar with, such as absorption and scattering, spontaneous or stimulated emission, and second harmonic generation. In polar semiconductors, the electromagnetic 田野 of light polarizes the matter leading to the formation of elemental excitations such as excitons and exciton polaritons, due to long-range dipolar force as well as additional coupling to the optical 田野同志s. In this talk, I will first introduce the background of exciton, exciton polaritons and the electron/exciton-longitudinal optical phonon (LOP) interactions in semiconductors. I will then present the first fluorescence laser cooling of semiconductors based on cadmium sulfide nanoribbons, enabled by enhanced strong exciton-LOP coupling at nanoscale. In zinc telluride nanoribbons, resolved-sideband 拉曼 cooling of LOPs can be realized with a similar physical picture of cavity optomechanics, in which the excitonic mode was utilized to assist the photoelastic 拉曼 scattering from the LOPs. By detuning the laser pumping, the dipole oscillation of the LOPs is photoelastically attenuated (enhanced) to a colder (hotter) state, corresponding to the laser cooling of amplification of the LOPs respectively. Finally, I will introduce our recent work on strong light-matter coupling in all-inorganic perovskite crystals embedded in optical microcavities. Those prototype semiconductors have exceptionally large exciton binding energy, strong oscillator strength and facile epitaxy-free growth. Room temperature exciton polariton lasing can be realized, which was unambiguously evidenced by a superlinear power dependence, macroscopic ground state occupation, blueshift of ground state emission, and the build-up of long-range spatial coherence, suggesting considerable promise of room temperature polariton devices and coherent light sources extending from the ultraviolet to near infrared range. Future work will be briefly discussed, with a particular interest on transient spectroscopy investigations of semiconductors.References:一.奥迪Q7. Su, et al., Room temperature polariton lasing in all-inorganic perovskites, Nano Letters一7, 3九八贰–3988(2017)二.J. Zhang, et al., Resolved-sideband 拉曼 Cooling of an Optical Phonon in Semiconductor Materials, Nature Photonics十, 600-60伍(201陆)三.S.T. Ha, et al., Laser cooling of organic-inorganic lead halide perovskites, Nature Photonics十, 1一5–1二一 (201陆)四.Q. Zhang, et al., Room-temperature near-infrared high-Q perovskite whispering-gallery planar nanolasers, Nano Lett. 14, 59玖伍-600一 (201四)5.J. Zhang, et al., Laser cooling of a semiconductor by 40 凯尔文 Nature493, 50四-508 (201三) (Cover Highlight, highlighted by Nature Photonics in its April and May issues)报告人简要介绍:熊渠华是加州圣巴巴拉分校大学数理科学大学和电气电院双聘教师。他1997年本科结束学业于武大物理系,三千年从东京应用物理研商所得到博士学位,200陆年于早稻田州立大学猎取博士学位,师从PeterC. Eklund教授。200陆-2010年在复旦CharlesLieber商量组从事学士后切磋。二零一零年拿走新加坡共和国国立研讨基金研商员项目帮助于3月插足里士满希伯来高校,任南洋助教。201四年获得一生教员职员,二零一五年升正助教。他于201四年起担任数理科学高校副司长主持科学探究, 大学生教学,20一柒年发轫要承担教员职员事务。熊教师的根本切磋世界是以稳态和弹指态光谱学为重大实验花招,以光和物质互相作用为钻探宗旨, 珍视研究低维半导体收音机微米质感基于光子-声子-电子耦协功效的情理机制和量子调控。他在皮米光子学和外部等离子体学,激光冷却,以及贰维半导体收音机材料光学性质等壹密密麻麻前沿课题做出了一雨后玉兰片有震慑的劳作。在《自然》及子刊, 《皮米通信》,《先进质地》等1体系国际资深杂志上登载了170多篇小说,并被世界名牌杂志及公众传播媒介所广播发表,总引用次数超越6500余次,H-因子48。其美好的切磋获得了1部分表彰和分明,举个例子新加坡共和国物军事学会纳Miko技奖(20一⑤),新加坡共和国国立琢磨基金N翼虎F Investigatorship奖(2014),和里昂希伯来高校南洋切磋特出奖(201四)等。附属类小部件:无

告知标题:强化反应器本领在高速可不仅仅化学进程中的应用Intensified reactor technologies for efficient andsustainable chemical processes报 告 人:University of Groningen 乐军博士告诉时间:二〇一八年5月110日深夜九:30告知地方:逸夫工程馆10五室招待广大师生前往!化学与化经济大学二〇一八年11月二二十四日告诉剧情:The development of efficient and sustainable chemical processes (especially in terms of biobased chemicals and fuels synthesis) is currently the focus of many research activities, which opens great opportunities for the application of intensified reactor technologies. In this presentation, the recent research activities in our group along this direction will be introduced, with emphasis on the promising use of microreactor as well as centrifugal contactor and separator in a variety of (biobased) chemical processes. Typical reaction cases to be dealt with include sugar dehydration to furanics, oxidation of 伍-hydroxymethylfurfural, hydrogenation of levulinic acid, catalytic methane combustion, biodiesel synthesis, lactic acid and chiral extraction. The reactor engineering aspects (transport characteristics, process intensification potential) and chemistry insights (homogeneous/heterogeneous catalysis, reaction mechanism) will be discussed particularly.报告人简单介绍:乐军,19九七年结业于天津高校化学工业系工业催化专门的学业,获本科学位。二零零六年获法兰西萨瓦大学和中科院浦那化物研讨所联袂培养和陶冶大学生学位。二〇〇八年至201四年在荷兰王国埃因霍温金融学院从事博士后研商。201四年八月于今为荷兰格罗宁根大学助教,重要从事新型反应器手艺(如微反应器、离心接触-分离器)的支出及其在快捷化学和财富转化进度中的应用,斟酌重要之1在于生物质催化转化制能源和高附加值化学品。近来正带领博士生柒名、博士生4名。已在国际学术期刊如GreenChemistry、Lab on a Chip、Catalysis Today、AIChE Journal、Chemical Engineering Journal等公布作品2五篇,Web of Science引用次数700余次。附属类小部件:无

报告地方:30号楼62伍报告厅

告知时间:2018年4月二十八日(星期肆)15:00-壹七:00

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