报告人简介： 布朗教授从1978年开始从事光学和光电子学领域的工作，当时他在GTE实验室从事光纤系统设计。在那里，他写出了系统建模软件，用于设计第一个实时路况1.3 µm光纤电话连接。从那时起他就开始给很多公司做顾问还有技术上的合作，如IBM、康宁公司、ABB Kent-Taylor、Amp、罗克韦尔公司、Rochester Gas and Electric，连同一些法律公司和许多光学研究所的工业协会。他的博士论文在Dennis Hall教授指导下在光学研究所完成，论文研究基于硅的光电子学，特别强调在硅上的外在光发射的机制。自从1987年加入这个光学研究所，布朗教授既教研究生也教本科生，建立了本科生荣誉研究计划，目前负责大约80名学生的本科课程。1994年获得工程学院本科生优秀教学奖。他的专业协会会籍包括美国光学学会，国际光学工程学会和美国材料研究学会。他已经担任许多专业杂志的仲裁，在激光与电光子学会议，西部光电子大会，光学和光子学（国际光学工程学会年度会议），东北光电子和前沿光学（美国光学学会年度会议）的技术项目委员会工作，他目前是在网络杂志光学快报编缉部，已经独立撰写了超过60多篇出版物，10项专利，3本书的章节，四卷光学百科全书的编辑，2008年出版的世界百科全书文章题为光与偏振光的共同作者。布朗教授是美国光学学会的会员，是美国光学学会罗彻斯特分会的会长,目前是美国光学学会偏振工程技术小组的主席。2006年，他作为丹尼森杰出访问教授应邀到悉尼大学访问三个月。1987年7月在光学研究所工作，2008年3月成为正教授，目前是本科教学的主席和光学设计与工程的Robert E. Hopkins 中心的主任。在罗彻斯特他对半导体，光电子，光纤微观结构，光偏振和光学工程进行了研究。他早期研究主要是稳定频率的半导体激光设计和基于硅的波导技术，包括第一个在非线性的布拉格反射镜中的全光开关的实验观察。他的文章分别在1993年和2000年被光学和光子学新闻在最好的光学研究之间引用。布朗教授目前的研究活动包括： 1) 偏振涡流光束的聚焦和相干性能 2)压力双折射原理引起的光学旋涡 3) SOI波导中的高品质因数谐振器 4) 光子晶体纤维的建模和特性描述 5) 用于光敏聚合物的量子放大同分异合体的光学性能. 关于偏振聚合物的研究已经应用于半导体印刷术和检测，以及单分子成像中[PRL 86, 5251 (2001)].
Biography:Professor Brown began his work in optics and optoelectronics in 1978 as an optical fiber systems designer at GTE Laboratories. While there, he wrote the systems modeling software which was used to design the first live-traffic 1.3 µm optical fiber telephone link. Since that time, he has had consultancies and technical collaboration with companies such as IBM, Corning Inc., ABB Kent-Taylor, Amp, Rockwell, Rochester Gas and Electric, and Emerson Corporation, along with several law firms and many of the Industrial Associates of the Institute of Optics. His doctoral dissertation, carried out at the Institute of Optics, under the supervision of Professor Dennis Hall, was in the area of silicon-based optoelectronics with particular emphasis on mechanisms for extrinsic light emission in silicon. Since joining the Institute faculty in 1987, Professor Brown has taught on both the Graduate and Undergraduate levels, established the Undergraduate Honors Research Program, and currently oversees an undergraduate program of approximately 80 students. He received a College of Engineering award for excellence in undergraduate teaching in 1994. His professional affiliations have included the Optical Society of America, SPIE, and the Materials Research Society. He has served as refereee for numerous professional journals, has served on the Technical Program Committee for the Conference on Lasers and Electro-Optics, Photonics West, Optics and Photonics (the annual meeting of SPIE), Opto-Northeast, and Frontiers in Optics (the annual meeting of the OSA); he is currently on the editorial board for the web-based journal Optics Express. He has authored over 60 publications, 10patents, 3 book chapter,was an editor for the four-volume Optics Encyclopedia, and served as co-contributor of articles entitled Light and Polarized Light for the 2008 edition of the World Book Encyclopedia. Professor Brown is a Fellow of the Optical Society of America, is President of the Rochester Local Chapter of the Optical Society of America, and currently serves as the Chair of the Polarization Engineering technical group of the OSA. In 2006, he was invited to spend three months at the University of Sydney as the Denison Distinguished Visiting Professor. Thomas G. Brown has been on the faculty of the Institute of Optics since July of 1987, has held the rank of full professor since March of 2008, and currently serves as chair of undergraduate studies and director of the Robert E. Hopkins Center for Optical Design and Engineering. While at Rochester, he has conducted research in semiconductors, optoelectronics, optical fiber microstructures, optical polarization, and optical engineering. His early research focused on frequency-stable semiconductor laser design and silicon-based waveguide technology, including the first experimental observation of all-optical switching in a nonlinear Bragg reflector. His publications have twice (1993 and 2000) been cited among the best optics-related research by Optics and Photonics News. Professor Browns recent research activities have included: 1) Focusing and coherence properties of polarization vortex beams; 2) Optical vortices induced by stress birefringent elements; 3) High Q resonators in SOI waveguides; 4) Modeling and characterization of photonic crystal fibers; 5) Optical properties of quantum amplified isomers for photopolymers. The work on polarization polymers had been applied to semiconductor lithography and inspection, and single molecule imaging [PRL 86, 5251 (2001)]. 报告摘要： 偏振光场在非均匀空间中，其聚焦、传播、照明和成像过程具有吸引人的效应。本报告将对该领域做一个概述，介绍成像系统中光学元件边缘的确定应力对光学旋涡场及景深扩展的影响。
Abstract:Spatial inhomogeneities in the polarization of a light field can show fascinating effects in focusing, propagation, illumination, and imaging. This talk will provide an overview of such fields and describe how deterministic stress on the periphery of an optical element can produce effects ranging from optical vortices to extended depth of focus in an imaging system.
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