一则报道（1）： http://phys.org/news/2015-03-silicon-photonic-chips-processor-package.html 另一则报道（2）： http://www.cipeasia.com/400.html 首先我想说，报道1中的两个人的报告我都听过，上周是德国物理年会（DPG），在柏林工大开，据说有6000多人参加（这只是德国年会的一个分场，可以想下德国物理年会的规模有多大）。我们老板搞了一个特别分场：光互连技术，邀请了IBM，IMEC的人过来。上周4，报道1中的 人物1Dangel在DPG做了一个邀请报告，我听下来记住了2点：一个是big data时代下的数据中心的构架，也就是下一代数据中心；二是他展示了一个新玩意儿，Si波导和polymer波导耦合。这个玩意儿就是报到1中说的东西。其他内容他的同事以前讲过。 我查阅了下今年OFC，报道1中说的东西来自于OFC上Bert J. Offrein的一个邀请报告： W3A.4 • 14:00 Invited Silicon Photonics for the Data Center, Bert J. Offrein1; 1IBM Research GmbH, Switzerland. To fully benefit from silicon photonics technology at the system-level, novel electro-optical assembly techniques are required enabling a close integration with the processor or switch chip. Optical coupling and signal distribution options are discussed. Bert J. Offrein也就是报道1中的人物2，去年在柏林一个光互连的会议上“1st Optical Interconnect in Data Centers Symposium”我听过他的报告，下个礼拜他要来我们这里绿色光子学的论坛上报告，估计他还要讲那些。打下广告，感兴趣的可以看下 http://green-photonics-symposium.com/ ，这是我老板和以色列理工一个教授组织的一个symposium，去年在海法开的，今年在TU Berlin开，免费注册，免费听，不管饭。请的人都是学术界和工业界的大牛，IBM每年必来。 那个Si波导和Polymer波导亲密接触，让IBM的路线图从“Optical fibers across the boards”跨到了“Optical waveguides in/on boards”（关注IBM光互连技术路线图的就知道这是啥玩意儿），再下一步就是“Optical interconnects integrated with the processor”，也就是片上光互连，全光芯片。 报道2的“随着近日IBM宣布已成功研制出实用化的硅光学芯片，这项已有二十年发展历史的技术重新泛起日出般的光芒”其实并不准确，我不知道其所说的“硅光学芯片”是什么东西，至少和了解的和听到的报告相差十万八千里，好吧，我下周再仔细听听Bert J. Offrein的报告确认下。 最后我以有限的知识纠正下很多人（包括一些自称做光互连的人）的错误说法： 采用光互连技术取代电互连技术，不是光子的速度比电子的速度快；光是电磁波，电互连技术传输的也是电磁波，不是电子，所以信号的传播速度是一样的。只是光互连的带宽比电互连带宽要大，而且损耗小，功耗低，传输距离远，没有串扰，体积也小。 不相信我的话，可以自己去查找资料。 最后来一张德国猪肘，吃得快吐了，量特大，吃了一半打包回家：
还有不到40小时，2013年就要过去了。在过去的一年里忙忙碌碌，很少静下来总结下自己的研究工作。上半年主要是集中精力写各种基金的申请书，做实验的时间被占用了不少。而下半年做实验的时间倒是增加了不少，但精力又被几篇修改的论文分去了一部分。 现在回头看看今年的一些科研工作，能够拿出来的也就下面三个工作： 1、采用低压空气电弧放电法成功实现了单壁、双壁、多壁碳纳米管的制备，尤其是双壁、多壁碳纳米管的宏量制备。单壁碳纳米管的大量制备还有一点难度，这将是2014年的重点科研课题。 2、采用热注射法制备了一系列无机量子点/石墨烯杂化物材料，初步研究了这些杂化材料的光电响应特性。正在投递和发表了若干篇相关的论文。这为我的碳纳米材料研究提供了新的应用方向。 3、将电弧放电法制备碳纳米管所产生的超细碳颗粒（副产物）进行分选，并以此为原料制备出碳量子点，详细研究了制备过程中反应温度、时间对碳量子点尺寸、光致发光特性的影响。研究证实了这种碳量子点具有很好地荧光上转换特性。 在过去的一年里以第1作者分别在Nanoscale、Mater. Res. Bull.上发表SCI论文3篇，以第2作者分别在Nanotechnology、Carbon、Mater. Lett.等国际SCI期刊上发表学术论文4篇。以第1发明人身份申请发明专利1项。另外有2项发明专利获得授权。另外，今年申请的几个基金中仅中了上海市自然基金，国家的青年基金评价为1A3B，会评没有通过。这使得我2014年申请基金的压力陡增！准备1月份把手头的工作暂且缓一下，全力准备基金申请。 2014年规划 基于2013年的科研状况，我2014年的重要工作也基本明确了，也就这么几点： 1、申请国家自然基金青年基金和教育部新教师基金 2、深入研究低压空气法大量制备单壁碳纳米管； 3、继续碳纳米材料及其应用研究； 4、适当提高论文发表档次。 2014年即将到来，希望我的2014能够一切顺利！ 1. Y Su , X Lu, M Xie, H Geng, H Wei, Z Yang, Y Zhang. Nanoscale, 2013, 5(19), 8889–8893. 2. Y Su , H Wei, T Li, H Geng, Y Zhang. Mater. Res. Bull., 2014,50, 23–5. 3. Y Su , P Zhou, J Zhao, Z Yang, Y Zhang. Mater. Res. Bull., 2013, 48(9), 3232–3235. 4. Y Su , J Zhang; Lzhang, Y Zhang, J. Nanosci. Nanotechnol., 2013, 13, 1078–1081. 5. Y Su , M Xie, X Lu, H Wei, H Geng, Z Yang, Y Zhang, RSC Adv., Accepted. 6. H Wei, Y Su , Z Han, T Li, X Ren, Z Yang, L Wei, F Cong, Y Zhang. Nanotechnology, 2013, 24(23), 235706. 7. J Zhao, Y Su , Z Yang, L Wei, Y Wang, Y Zhang. Carbon, 2013, 58, 92–98. 8. H Geng, Y Su , H Wei, M Xu, L Wei, Z Yang, Y Zhang. Mater. Lett., 2013, 111, 204–207. 9. J Zhang, Y Su , H Wei, J Wang, C Zhang, J Zhao, Z Yang, M Xu, L Zhang, Y Zhang. Mater. Lett., 2013, 107, 251–254.
W***EFRONT CONTROL WITH REALISTIC SPATIAL LIGHT MODULATOR IN A MULTI-APERTURE IMAGER Thesis Submitted to The School of Engineering of the UNIVERSITY OF DAYTON In Partial Fulfillment of the Requirements for The Degree of Master of Science in Electro-Optics 共124页。 摘要： A multi-aperture imaging system with a non-mechanical steering device replacing each lens sub-aperture was considered. This setup allows for focusing and tracking of a target over a fine angle while preserving high resolution imaging in a compact system. An imaging system has the ability to digitally add focus for receiving. However, in the case of transmitting the focus must be provided by optical components. Even when receiving, at a short enough range it might be necessary to introduce optical corrections to avoid phase aliasing. To this end, the effects of implementing a real device such as the BNS Spatial Light Modulator (SLM), a reflective 512x512 pixels with 83.4% area fill factor steering device, on the multi aperture imaging system were investigated. The pixelated phase of the SLM, and the use of 2π resets to provide stepped blazed phase profiles for steering and stepped quadratic phase focusing, are modeled. Each pixel of the SLM is modeled by an array of 10x10 elements with 9 active and 1 inactive in both the x and y direction. As expected, and shown by the simulation results, the periodic reset of the quadratic phase bowl introduced phase grating modulations, which produces the so call “ghost image” around the center image. By only providing stepped blazed profile to steer, the simulation shows that with increasing phase steps within the blazed profile the diffraction efficiency increase but at the cost of decreased steering angles. The ability of the SLM to correct for aberrations and its limitation in correcting aberration is investigated. Further, the basic concept of conformal aperture, enabled by the multi-aperture, was investigated and simulated. 下载地址： http://www.pipipan.com/file/21636426
SIGNAL TO NOISE RATIO EFFECTS ON APERTURE SYNTHESIS FOR DIGITAL HOLOGRAPHIC LADAR Thesis Submitted to The School of Engineering of the UNIVERSITY OF DAYTON In Partial Fulfillment of the Requirements for The Degree of Master of Sciences in Electro-Optical Engineering 共117页。 摘要： The cross-range resolution of a laser radar (ladar) system can be improved by synthesizing a large aperture from multiple smaller sub-apertures. This aperture synthesis requires a coherent combination of the sub-apertures; that is, the sub-apertures must be properly phased and placed with respect to each other. One method that has been demonstrated in the literature to coherently combine the sub-apertures is to cross-correlate the speckle patterns imaged in overlapping regions. This work investigates the effect of low signal to noise ratio (SNR) on an efficient speckle cross-correlation registration algorithm with sub-pixel accuracy. Specifically, the algorithms ability to estimate relative piston and tilt errors between sub-apertures at low signal levels is modeled and measured. The effects of these errors on image quality are examined using the modulation transfer function (MTF) as a metric. The results demonstrate that in the shot noise limit, with signal levels as low as about 0.02 signal photoelectrons per pixel in a typical CCD, the registration algorithm estimates relative piston and tilt accurately to within 0.1 radians of true piston and 0.1 waves of true tilt. If the sub-apertures are not accurately aligned in the synthetic aperture, then the image quality degrades as the number of sub-apertures increases. The effect on the MTF is similar to the effects due to defocus aberrations. 下载地址： http://www.pipipan.com/file/21632502
相关文献下载： ICBA的历史.rar ICBA的历史.pdf 最近在与师弟师妹的讨论中发现他们对于 ICBA 这个非常优秀的材料的历史不了解，毕竟他们都是物理和电子学背景的，对有机电子学的合成部分，凡是涉及到分子式的就一概略过了。特写一个简单的文章，希望对师弟师妹们有所帮助 。 Chinese Version ICBA 于 1997 年第一次合成得到的； 2008 年第一次用于太阳能电池，效率为 5.1% ，可惜被申请了专利； 2010 年何有军师兄在很多富勒烯衍生物中筛选出 ICBA 这个分子，并且成功优化到 5.44%, 赵师兄进一步优化到了 6.5%, 之后他们组对 ICBA 及相关衍生物进行了一系列的优化和系统性研究。 ICBA 是一个非常优秀的材料，因为它的易制备，高溶解性，高 LUMO 值，高 Voc 值等，近几年对其及衍生进行了大量的研究，如三元体系，电荷转移，倒置电池等。 缺点是 1 ） ICBA 及相关早被申请了大量的专利 2 ） LUMO 太高，与很多聚合物的能级不匹配，只与 P3HT 有很好的效果。 窃以为，如果有 LUMO 值高于 PCBM 在 0.05~0.12eV ，且是少于 4 个的富勒烯 C60 衍生物的会非常有前途，不过我还有找到，同时也没有别人找到 :( PCBM 是 1995 年第一次被 Wuld 合成出来 1 ，俞刚第一次将其与 MEH-PPV 共混得到 2.9% 的效率 2 ， PCBM 的广泛研究中， Wuld 的文章一直是被提到的，同样对 ICBA 的研究中， Neilands 3 和 Laird 4,5 的铺垫性工作也是需要提到的，我们的每一份学术成果都是踏在前辈的脚印和尸体上。 English Version ICBA, Indene C60 Bi adduct. 茚与 C60 双加成物 History of ICBA (Indene C60 Biadduct) from synthesis, application, opimization. ICBA was a very excellent fullerene material, which waseasy to prepare, high solubility, high LUMO level and high Voc. It's was firstly synthesis in 1997, first application in OPV in 2009, first opimization with PCE=5.44% in2010.Much study have been done after ICBA's reexplorer in 2010 by Dr. He You-jun and Prof. Dr. Li Yong-fang, such as, e.g. ternary material, charge transfer, inverted cells. Below is its detailed history. 1) C60ICBA, Ref 3 First synthesis of ICBA in 1997 2) ICBA 太阳能电池 PCE=5.1%, 专利 Ref 4,5 ICBA's First Application in organic photovoltaic in 2008, patent. 3) ICBA 用于太阳能电池的优化， PCE=5.44%, Ref 6 Optimization of ICBA in OPV in 2010 4) ICBA 用于太阳能电池的进一步优化， PCE=6.5% ， Ref 7 Further Optimization of ICBA 5) ICBA 用于太阳能电池 , PCE=5.79%, Ref 8 ICBA's first application in OPV 6) 将 MoO3 取代 PEDOT:PSS ， ICBA 的器件优化 ,Ref 9 ICBA's application in OPV with MoO3 instead of PEDOT:PSS in 2012 7) ICBA 相关文章，自从 2010 年李永舫老师和何有军师兄发掘了 ICBA 这个非常优秀的材料易制备，高溶解性，高 LUMO 值和高 Voc 值后，业界对其做了大量的研究，做了很多相关研究，如三元体，电荷转移，倒置电池等。 ， Ref 10-16 Much study have been done after ICBA's reexplorer in 2010 by Dr. He You-jun and Prof. Dr. Li Yong-fang, such as ease to prepare, high solubility, high LUMO level and high Voc, e.g. ternary material, charge transfer, inverted cells. Topliuchao@gmail.com 2012-2-11 9:46:32 References: (1) J. C. Hummelen, B. W. Knight, F. Lepeq, F. Wudl, J. Yao, C. L. Wilkins, "PREPARATION AND CHARACTERIZATION OF FULLEROID AND METHANOFULLERENE DERIVATIVES", Journal of Organic Chemistry , 1995 , 60 , 532. (2) G. Yu, J. Gao, J. C. Hummelen, F. Wudl, A. J. Heeger, "Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions", Science , 1995 , 270 , 1789. (3) Austris Puplovskis, Janis Kacens, Ojars Neilands, "New route for fullerene functionalisation in cycloaddition reaction using indene", Tetrahedron Letters , 1997 , 38 , 285. (4) Darin W. Laird, Reza Stegamat, Henning Richter, Viktor Vejins, Larry Scott, Lada; Thomas A., "ORGANIC PHOTOVOLTAIC DEVICES COMPRISING FULLERENES AND DERIVATIVES THEREOF", 2008 ,WO/2008/018931. (5) Darin W. Laird, Henning Richter, Viktor Vejins, Lowrence Scott, Lada; Thomas A., Reza Stegamat, Daadi Malika, "Organic photovoltaic devices comprising fullerenes and derivatives thereof and improved methods of making fullerene derivatives", 2009 ,WO2009086210A2. (6) Y. J. He, H. Y. Chen, J. H. Hou, Y. F. Li, "Indene-C-60 Bisadduct: A New Acceptor for High-Performance Polymer Solar Cells", Journal of the American Chemical Society , 2010 , 132 , 1377. (7) Guangjin Zhao, Youjun He, Yongfang Li, "6.5% Efficiency of Polymer Solar Cells Based on poly(3-hexylthiophene) and Indene-C60 Bisadduct by Device Optimization", Advanced Materials , 2010 , 9999 , NA. (8) Y. J. He, G. J. Zhao, B. Peng, Y. F. Li, "High-Yield Synthesis and Electrochemical and Photovoltaic Properties of Indene-C-70 Bisadduct", Advanced Functional Materials , 2010 , 20 , 3383. (9) Xi Fan, Chaohua Cui, Guojia Fang, Jinzhao Wang, Songzhan Li, Fei Cheng, Hao Long, Yongfang Li, "Efficient Polymer Solar Cells Based on Poly(3-hexylthiophene):Indene-C70 Bisadduct with a MoO3 Buffer Layer", Advanced Functional Materials , 2012 , 22 , 585. (10) Xiangyue Meng, Wenqing Zhang, Zhan'ao Tan, Chun Du, Cuihong Li, Zhishan Bo, Yongfang Li, Xiulin Yang, Mingming Zhen, Feng Jiang, Junpeng Zheng, Taishan Wang, Li Jiang, Chunying Shu, Chunru Wang, "Dihydronaphthyl-based fullerene bisadducts for efficient and stable polymer solar cells", Chemical Communications , 2012 , 48 , 425. (11) Y. J. He, Y. F. Li, "Fullerene derivative acceptors for high performance polymer solar cells", Physical Chemistry Chemical Physics , 2011 , 13 , 1970. (12) Youjun He, Bo Peng, Guangjin Zhao, Yingping Zou, Yongfang Li, "Indene Addition of -Phenyl-C61-butyric Acid Methyl Ester for High-Performance Acceptor in Polymer Solar Cells", the Journal of Physical Chemistry C , 2011 , 115 , 4340. (13) Youjun He, Hsiang-Yu Chen, Guangjin Zhao, Jianhui Hou, Yongfang Li, "Biindene-C60 adducts for the application as acceptor in polymer solar cells with higher open-circuit-voltage", Solar Energy Materials and Solar Cells , 2011 , 95 , 899. (14) Youjun He, Hsiang-Yu Chen, Guangjin Zhao, Jianhui Hou, Yongfang Li, "Synthesis and photovoltaic properties of biindene-C70 monoadduct as acceptor in polymer solar cells", Solar Energy Materials and Solar Cells , 2011 , 95 , 1762. (15) Yen-Ju Cheng, Chao-Hsiang Hsieh, Youjun He, Chain-Shu Hsu, Yongfang Li, "Combination of Indene-C60 Bis-Adduct and Cross-Linked Fullerene Interlayer Leading to Highly Efficient Inverted Polymer Solar Cells", Journal of the American Chemical Society , 2010 , 132 , 17381. (16) Petr P. Khlyabich, Beate Burkhart, Barry C. Thompson, "Efficient Ternary Blend Bulk Heterojunction Solar Cells with Tunable Open-Circuit Voltage", Journal of the American Chemical Society , 2011 , 133 , 14534.
标签: 光电
