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          太赫茲激光納米顯微技術

          時間:2019-01-10瀏覽:226編輯:攝影:    通訊員:設置

          系列報告

          (報告一)題目:Laser terahertz emission nanoscopy太赫茲激光納米顯微技術

          報告時間:20191109:30 -10:30

          報告地點:光電報告廳

          報告摘要:Laser terahertz emission spectroscopy has become a standard tool for studying nonlinear optics and ultrafast carrier dynamics in solids. In this process, excitation of a sample by a femtosecond optical pulse produces a picosecond burst of terahertz radiation as a signature of ultrafast charge carrier dynamics. This versatile optical technique can provide valuable information about the initial phases of carrier motion immediately following photoexcitation, and has been applied to many different material systems, including both bulk and surface dynamics in semiconductors, as well as new materials such as graphene and strongly correlated materials such as high-Tc oxides and topological insulators. These studies have all been limited in their spatial resolution by the diffraction-limited focusing of the input optical beam. In this talk, we discuss the adaptation of this emission spectroscopy technique to the nanoscale. Inspired by recent results in scattering-type near-field terahertz imaging and spectroscopy, we have constructed a new microscope for performing terahertz emission spectroscopy with nanometer spatial resolution. We demonstrate that the nonlinear process giving rise to terahertz emission is confined to a tip-size limited spatial region, on the order of 20 nm. This development offers the exciting new possibility of performing emission spectroscopy on individual nanoparticles.

          報告人簡介:Daniel Mittleman received his PhD from the University of California Berkeley in 1994.After two years as a post-doctoral member of the technical staff at Bell Laboratories, he joined the faculty of the Electrical and Computer Engineering Department at Rice University in 1996.He moved to the School of Engineering at Brown University in 2015, where he continues to pursue research in the science and technology of the terahertz range. Dr. Mittleman is a Fellow of the OSA, the APS, and the IEEE. He is currently serving a three-year term as the Chair of the International Society for Infrared Millimeter and Terahertz Waves.

            

            

          (報告二)題目:The review of terahertz太赫茲的研究進展

          報告時間:201911010:30 -11:30

          報告地點:光電報告廳

           

          報告人簡介:張希成教授,羅徹斯特大學光學研究所主任教授(Parker Givens Chair of Optics, The Institute of Optics, University of Rochester)。北京大學物理系77 屆學生。1981年從北京大學物理系赴美留學CASPEA program),1986年年獲美國布朗大學(Brown University)物理博士學位。1984年——1991年先后在麻省理工學院(MIT)、阿莫科研究中心(Amoco Research Center)和哥倫比亞大學(Columbia University)從事研究工作。1992年進入倫斯勒理工學院(Rensselaer Polytechnic Institute)任教,主任教授 (Erik Jonsson Chair Professor of Science), 太赫茲研究中心主任,和代理系主任。2012年——2017羅徹斯特大學光學研究所所長。他是中科院和中國多所大學的兼職教授。2012任莫斯科國立大學(Lomonosov Moscow State University)榮譽教授。2014任圣彼得堡ITMO大學科學顧問。張希成教授是AAAS, APS, IEEE, OSA, and SPIE Fellow。張教授同時各類國際會議中作大會發言、各類學術報告、學術研討以及特邀報告400余次。他也是多家學術期刊雜志的編委和Optics Letters的主編(2014-2016)。累計在國內外期刊發表了論文300余篇、參與了20多本書及相關章節的編寫工作、擁有29項美國專利。張希成教授從1988開始在THz成像和生物-醫學應用,超快光子學、光電子學領域的研究。張希成教授的H-Index = 83; 總文章引用次>30,000 (Google Scholar)

            

           

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