北京時間7月24日晚8點，大家期待已久的iCANX Talks第十五期即將重磅來襲，本期是iCANX聯合Light雜誌社推出的「光照亮世界-紀念雷射發明60年」專場，邀請了三位頂尖學者為大家帶來最新科研成果。來自羅切斯特大學光學研究所的郭春雷教授將為我們帶來利用飛秒雷射在微納加工方面取得的最新進展，中科院長春光機所Bimberg中德綠色光子學研究中心、柏林工業大學固體物理研究所的Dieter Bimberg教授將為大家介紹近期在高速、低功耗垂直腔面發射雷射器（VCSEL）研究方面取得的進展，北京大學的馬仁敏教授將討論微納雷射的基本物理機制以及微納雷射的模式調控及其相關的新奇物理現象。
The highly expected iCANX Talks Vol.15will be ceremoniously holed at 8:00 pm of July 24 (Beijing time). This time, the lecture of 「Light the world to celebrate the 60th anniversary of the laser」 was jointly launched by iCANX and Light, three top scholars were invited to bring you the latest scientific research reports. Prof. Chunlei Guo from The Institute of Optics at University of Rochester will bring us the latest work on femtosecond laser micro- and nano-processing. Meanwhile, Prof. Dieter Bimberg from 「Bimberg Chinese-German Center for Green Photonics」 of the CAS at CIOMP and Institute of Solid State Physics at Technical University will introduce high speed and low power vertical-cavity surface- emitting lasers (VCSELs). Prof. Renmin Ma from Peking University will discuss eigenmode engineering of nanolasers and Jordan vector based radiation mechanism.
在前幾期的iCANX talks直播中，吸引了全球數以萬計的業內學者觀看直播，由研究生組成的學術小組整理撰寫的書面學術報告也深受學者們的喜愛。使得iCANX Talks成為極具影響力的高科技雲端學術峰會。
In the previous 14 weeks iCANX talks live broadcast, it has attracted tens of thousands scholars around the world, and the technical reports written by the graduate students are also highly popular among scholars. iCANX Talks has gradually grow up to a highly influential high-tech cloud academic summit.
話不多說，先讓小艾給大家詳細介紹今晚的三位重磅嘉賓及演講內容吧！
Here comes the three abstracts & Bios of this Friday’s iCANX Talks!
報告1
Green Data Communication: The Next Challenge after 5G
綠色數據通信：5G之後的挑戰
Dieter Bimberg
中科院長春光機所Bimberg中德綠色光子學研究中心、柏林工業大學固體物理研究所
Abstract
Since 2014 novel consumer applications like Netflix, Block Chain,… not known to appear at the horizon at that time have led to a huge increase of internet traffic of 60%/year, much more than then originally predicted by companies like Cisco. This increased use of the internet is increasing its electrical power consumption due to increased data traffic mostly inside data centers. New data centers have crossed the 500 MW level. 5G with its big jump in data speed will be another enabler for new services, like LIDAR and more we cannot think about yet, and will increase the energy consumption to an extent not further tolerable. More research has to be done on the energy-efficiency of data traffic on all hierarchy levels. Inside data centers advanced design of active optical cables, their electronic driver and receiver circuits and the active photonic devices are suddenly in the focus, with the goal to minimize their combined power consumption. Vertical-cavity surface-emitting lasers (VCSELs) for 200+ Gbit/s single fiber data transmission across OM5 multimode fiber with a record heat to bit rate ratio (HBR) of only 240 fJ/bit x wavelength @ 50Gbit/s developed in our labs are presented. We recently discovered photon lifetime management to be the key to adopt the overall energy consumption to the bit rate of the data traffic (e.g. 25 Gb/s, 50 Gb/s,..).
2014年以來，隨著雲視頻、區域鏈等新興消費類應用的興起，網際網路流量以每年60%的速度大幅增長，遠高於思科等公司最初的預測。網際網路流量的大幅增加，導致了數據中心內部電力消耗的急劇增加（新數據中心能耗已超過500 MW）。同時，5G和雷射雷達等應用的湧現，進一步加劇了數據中心內部的能耗。因此，必須在所有層面上對降低數據中心的能耗進行更多的研究。以光纖為基礎的光互連技術已廣泛的應用於數據中心，如何降低數據中心內部光互連能耗，包括雷射器晶片、探測器晶片、驅動電晶片的能耗，也成為近年來研究的熱點。本次報告，將主要介紹我們近期在高速、低功耗垂直腔面發射雷射器（VCSEL）研究方面取得的進展，包括在OM5多模光纖中驗證200 Gbit/s的高速數據傳輸、以及240 fJ/bit@ 50 Gbit/s的超低能耗，同時還將介紹如何通過調控光子壽命降低系統整體功耗（25 Gb/s, 50 Gb/s）。
Biography
Dieter Bimberg received the Ph.D. magna cum laude from Goethe University, Frankfurt, Germany. He held a Principal Scientist position at the Max Planck-Institute for Solid State Research, Grenoble, France, until 1979. After serving as a Professor of electrical engineering, Technical University of Aachen, Germany, he assumed the Chair of Applied Solid-State Physics at Technical University of Berlin. He is the Founding Director of its Center of Nanophotonics. He hold guest professorships at the Technion, Haifa, U.C. Santa Barbara, CA, USA, and at Hewlett-Packard in Palo Alto, CA. He was Distinguished Adjunct Professor at KAU, Jeddah 2012-2018. In 2018 he assumed the directorship of the 「Bimberg Chinese German Center for Green Photonics」 of the Chinese Academy of Sciences at CIOMP, Changchun.
He is a member of the German Academy of Sciences Leopoldina, the EU Academy of Sciences, a Foreign Member of the Russian Academy of Sciences, the US Academies of Engineering and of Inventors, a Life Fellow of the American Physical Society and the Institute of Electrical and Electronics Engineers, IEEE. He is recipient of multiple international awards, like the UNESCO Nanoscience Award, the Max-Born Award and Medal of IoP and DPG, the Heinrich-Welker-Award, the Nick Holonyak Jr. Award, the Japanese Oyo Buturi Award of Applied Physics, the Jun-Ichi Nishizawa Medal and Award of IEEE, and the Stern-Gerlach Award of DPG, to mention a few. He received honorary doctorates of the University of Lancaster, UK, and the St. Petersburg University of the Russian Academy of Sciences.
He has authored more than 1500 papers, 61 patents, and six books. The number of times his research works has been cited exceeds 65,000 and his Hirsch factor is 111. His research interests include physics and technology of nanostructures, nanostructured photonic and electronic devices, and energy efficient data communication.
Dieter Bimberg教授在德國法蘭克福大學獲得博士學位。曾任馬克斯·普朗克固體研究所首席科學家、德國亞琛工業大學電氣工程教授、柏林工業大學應用固體物理學主席、納米光子學中心創始主任、以色列海法理工學院和美國惠普公司客座教授、吉達大學（KAU）傑出兼職教授。2018年4月，任中科院長春光機所的「Bimberg中德綠色光子學研究中心」的主任。
Bimberg教授是德國科學院、歐盟科學院的成員，俄羅斯科學院、美國工程院和美國國家發明院院士，美國物理學會和IEEE的終身會員，獲得英國蘭卡斯特大學和俄羅斯科學院聖彼得堡大學的名譽博士學位。Bimberg教授獲得多個國際獎項，包括Stern-Gerlach獎章（DPG）、Nishizaza獎章（IEEE）、Nick Holonyak jr.獎章（OSA）、中國科學院優秀國際學者、Heinrich-Welker-Award獎章、聯合國教科文獎章、William Streifer獎章（IEEE）、Max-Born獎章（IOP and DPG）。他發表1500餘篇論文，61項專利，6本專著。總引超過65000次， H因子高達111。他的研究領域包括納米結構的物理和技術，納米結構的光電器件以及節能數據通信等。
Keywords
Vertical-cavity surface-emitting lasers垂直腔面發射雷射器；High speed data transmission高速數據傳輸；Low power consumption低能耗；Photon lifetime management調控光子壽命.
報告2
Exotic Lasing and Field Manipulation at Microscale
微納光場調控與雷射物理
Renmin Ma馬仁敏
Peking University北京大學
Abstract
Laser is one of the most important inventions of the 20th century, whcih has wide applications range from nuclear fusion, manufacturing, optical communication, high-precision metrology, spectroscopy, and quantum information processing and so on. Advanced fundamental understanding on light-matter interaction provides a powerful toolbox for exotic lasing phenomena and field manipulation at microscale. In this talk, I will first discuss the intrinsic merit of microscale lasers, the key characteristics of them and the underlying physics. Then I will discuss eigenmode engineering of nanolasers, which can lead to novel inner laser cavity field and/or emission beam synthesis. Furthermore, ensembles of nanolasers operating in unison can provide a macroscopic response that would not be possible in conventional lasers. I will also discuss Jordan vector based radiation mechanism and it enabled exotic light source. I will conclude the talk with a perspective on the field.
自1960年第一臺雷射器發明以來，雷射物理與應用發展迅速，深刻的改變了現代科學與技術以及我們生活的方方面面。隨著光物理和微納製備技術的發展，目前微納光場調控和雷射物理已經成為國際上光物理、雷射物理與半導體物理的重要前沿交叉領域，處於重大機遇期，可能對光電集成、雷射雷達、材料加工、傳感探測、生物標記與成像、消費電子等領域帶來變革性推動。在報告中我們將討論微納雷射的基本物理和其性能優勢。同時我們將討論微納雷射的模式調控及其相關的新奇物理現象，包括約當矢量輻射機理和能帶反轉光反射機制等。最後我們將討論微納雷射的應用與展望。
Biography
Renmin Ma is a Boya assistant professor at PKU. His lab focuses on the research of exotic lasing phenomena and field manipulation at microscale and their applications in spectroscopy, commutation and computing. Ma lab discovered a new light reflection mechanism of band-inversion-induced reflection, and demonstrated high performance topological bulk lasers. Ma lab also discovered a Jordan vector based radiation mechanism, which breaks conventional notion on light-matter interaction. Over the years, Ma lab contributed to the development of plasmonic nanolasers which can lead to laser device with fast operation and high energy efficiency at molecular scale.
Dr. Ma received his PhD degree in Physics from Peking University in 2009. He was a postdoc researcher at UC Berkeley during 2009 to 2014 before joining Peking University as a faculty. His research interests include laser physics and devices, nanophotonics, light-matter interaction, non-Hermitian and topological photonics. He published over 50 peer reviewed papers, including 11 in Science, Nature and their sub-journals. He was a recipient of the National Top 100 Ph.D. Dissertations of China Award, China’s Top 10 Optical Breakthroughs of 2018 Award and APS Physics Top 10 "Highlights of the Year" of 2018.
馬仁敏博士現任北京大學博雅助理教授，他的實驗室主要研究獨特的雷射現象和微尺度的場操作及其在光譜學、換相和計算中的應用。馬博士的實驗室發現了一種新的帶反轉誘導反射光反射機制，並演示了高性能拓撲體雷射器。他的實驗室還發現了一個基於約當向量的輻射機制，這打破了傳統的光物質相互作用的概念。多年來，他致力於等離子體納米管的發展，這將促使在分子尺度上實現具有快速操作和高能量效率的雷射器件。
馬仁敏博士在2009年獲得北京大學物理學博士學位。2009年至2014年，他在加州大學伯克利分校擔任博士後研究員，之後加入北京大學任教。他的研究興趣包括雷射物理與器件、納米光子學、光與物質的相互作用、非厄米特光子和拓撲光子學。他發表了50多篇論文，其中11篇發表在《科學》、《自然》及其子刊上。他曾獲全國博士學位論文100強、2018年度中國光學十大突破獎、2018年度美國物理學會十大「亮點」。
Keywords
Micro scale lasers微雷射；nanolasers納米雷射；Jordan vector based radiation mechanism約當矢量輻射機理；Micro-nano scale laser applications微納雷射應用.
報告3
Abstract
As a powerful tool for high-precision material processing and functionalization, femtosecond lasers can pattern materials that are extremely hard to treat and produce surface textures down to nanoscale, which often resemble those found in nature and are far smaller than the light wavelength. In this talk, I will discuss some of our recent advancements in femtosecond laser micro- and nano-processing, including the resulting surface structures, a quest for laser lithography, the structural formation dynamics, and the drastically altered surface functionalities. I will also discuss a range of ensuing applications.
飛秒雷射已成為材料高精度加工和功能化的有力工具。飛秒雷射可以加工極端難處理的材料並在其表面生成納米級紋理圖案，這些紋理經常與自然界中發現的紋理相似，而且遠小於光波長。本次報告，將主要介紹我們近期利用飛秒雷射在微納加工方面取得的一系列進展，包括產生的表面結構，對雷射光刻的探索，結構形成動力學以及表面功能的顯著改變等，同時還將介紹相關技術的後續應用。
Biography
Chunlei Guo is a Professor in The Institute of Optics and Physics at University of Rochester. He also helped found an international lab for lasers and Photonics at CIOMP, China. His research is in the area of femtosecond laser-matter interactions, and his work at Rochester has led to the discoveries of a range of highly functionalized materials, including the so-called black and colored metals and superhydrophillic and superhydrophobic surfaces. These discoveries can find a broad range of applications and have received extensive public interest, including being featured 4 times on The New York Times. He is a Fellow of American Physical Society and Optical Society of America. Currently, he serves as the Editor-in-Chief for the CRC Handbook of Laser Technology and Applications (2nd Edition), which is due to release in 2020 as probably the most comprehensive handbook in the field of lasers.
郭春雷教授任職於美國羅切斯特大學，他也幫助建立了中國科學院長春光機所郭春雷光子實驗室。他長期致力於飛秒雷射與物質的相互作用方面研究。其重要研究成果包括發現了一系列高度功能化的材料，其中包括「黑金屬」、「彩色金屬」以及超親水和超疏水表面材料等。這些特性材料有著極其廣闊的應用前景，因此備受關注，曾先後4次被紐約時報專題報導。郭春雷教授是美國物理學會及光學學會會士。目前，他還擔任CRC《雷射技術與應用手冊》(第二版)的主編，該書計劃在2020年出版，將有望成為雷射領域最全面的指導手冊。
Keywords
Femtosecond lasers飛秒雷射； Micro- and nano-processing微納加工；Laser lithography雷射光刻；Structural formation dynamics動態結構；Surface functionalities表面修飾.
當然，除了三位重磅嘉賓，我們的主持人陣容也十分強大，分別是來自清華大學的孫洪波教授、內布拉斯加大學林肯分校的陸永楓教授和北京大學的張海霞教授！
每期iCANX Talks 直播結束後，組委會都會安排iCANX Talks學術小組撰寫學術報告總結，優質的學術總結報告廣受大家好評。這一獨特的參會聽取學術報告並撰寫總結報告的新形式，既為感興趣的參會者和讀者深度理解相關技術提供了幫助，也為研究生同學停課不停學，在家深入開展科研學習提供了平臺。
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