高速光子信号的相干操控研究

Coherent Control Of Ultrafast Photonic Signal

报告人Speaker：周建英 教授

时 间Time: 2009年11月26号下午16：00点

地 点Location: 光电实验室A101

报告摘要Abstract:

光子是现代信息技术的主要载体，光子信号的传输能力提供了前所未有的宽带海量“信息高速公路”，高速与海量光子信息技术的发展大大改变了经济与社会的发展方式。然而，光子信息的进一步发展遭遇了光子信号处理能力弱的严重挑战，其处理能力远弱于电子。因此，光子信息处理已成为制约高速信息光子技术的发展瓶颈。

光子信息处理包括光子开关、光子隔离、光子限幅、光子放大、以及光子能量的高速高效转换等内容，其核心是光子的缓存，包括光子减速、静止、受控释放与能量转化。光子信息处理的基本要素是超高速响应速度、低光子功率阈值、高转换效率以及较低的器件成本。而本讲座主要涉及的共振型光子晶体正是基于这种要求所发展的超高速光子器件。

通过分析比较多种超短脉冲激光的慢光传输与光场静止方法，讲座将集中分析基于共振型光子晶体中光场的相干操控研究。主要涉及内容是共振型光子晶体的工作原理、光学特性、器件的制备、表征以及在超快光子开关与缓存的应用研究。本讲座将叙述国内外在这一领域的研究动态，并对共振型光子晶体的研究现状与未来发展做出分析与评估，对其它可能应用于超高速光子信息处理方法做出分析比较。通过对高速海量信息的技术现状与未来发展需求分析，提出微纳光学、光子晶体光学、超快光学、量子光学以及先进材料制备的多学科综合发展，进而提出解决高速信息光电子技术中的全光信息处理的若干具体设想与方案。

Photon is the main carrier of modern information. Photons have the capability of much higher transmission speed which provides people with an unprecedentedly massive broadband information highway. The development of high-speed and massive photonic information technology has changed society and economy dramatically. However, further progress in photonic information technology is limited severely by the weak capability of photons in signal processing compared with electrons. In this sense, photonic signal processing has become the bottleneck for high-speed photonic information technology to develop to the next level.

Photonic information processing includes optical switch, photon separation, photon amplitude limitation, photon amplifier, high-speed and high-efficiency conversion of photon energy. The core underlying such concepts is the storage of photons, involving slowing down of light speed, trapping of photons, controlled release and energy conversion of photons. The basic factors related with photonic information processing are ultrahigh response speed, low photon power threshold, high conversion efficiency and relatively low device cost. The resonant photonic crystal which will be discussed in this lecture is exactly this kind of high-speed photonic device that satisfies the requirements mentioned above.

The lecture will focus on the study of the coherent manipulation of optical field based on resonant photonic crystals through comparisons among several different approaches to slow light transmission and optical field trapping of ultrashort laser pulses. The basic principles, optical characteristics, device fabrication and characterization, and their applications in ultrafast photonic switch and storage will be discussed in detail. The lecture will also talk about the domestic and international research trends in this field, make an analysis as well as an evaluation about the presence and future of photonic crystal research, and compare our method with other promising approaches in the application of high-speed photonic signal processing. The idea of simultaneous development of nano-optics, photonic crystal optics, ultrafast optics, quantum optics and advanced material fabrication as well as some plans and solutions of realizing all-optical signal processing in high-speed optoelectronic information technology will be put forward after the analysis of the state-of-art technology and the future development.

报告人简介Introduction to the speaker：

周建英博士，现为中山大学教授、博士生导师。1982年毕业于华中工学院光学系，1984年赴英国伦敦帝国理工学院学习，1988年获得博士学位。在帝国理工学院从事博士后研究工作后回国，在中山大学物理科学与工程技术学院从事博士后、讲师、副研究员、教授等职位的工作。曾担任过中山大学激光与光谱学研究所所长、国家重点实验室主任、中山大学理工学院学院院长等职务。与德国马普固体研究所、以色列魏兹曼科学研究所、俄罗斯莫斯科大学、香港科技大学、以及英国St Andrews等大学与研究机构保持密切合作关系。

周建英教授所涉及的研究课题，包括真空紫外波段相干光场的非线性频率转换，激光的模式控制，超快非线性光学，超快激光光谱与应用。他的主要学术贡献包括：提出了新的锁模理论，如动镜锁模理论；实现了波导中多种非线性光学过程的相位匹配；利用腔内中空波导控制与改进了飞秒激光的输出模式与波形；研究了金属离子探针在复杂分子体系中的光谱特性。近期，他的研究方向主要集中在超快光电子学物理、技术与器件制备。他提出并演示了利用主动型光子晶体实现超快光子开关，提出了超快光子信号的间隙孤子缓存以及能量的高速高效转换等方案。他提出并实现了利用光场相位控制方法制备复杂光子晶体的方案，受到了国际同行的广泛关注。

周建英教授在国际重要学术刊物发表论文80余篇，论文被同行引用600多次。在1993年入选教育部跨世纪人才培养计划，是1995年获香港求是基金会首批“杰出青年学者奖”，1997年评为“全国优秀回国留学人员”，2005年评为“全国优秀博士后”。

Dr. Jianying Zhou is presently a professor at Sun Yat-sen University as well as a doctoral tutor. In 1982, he graduated from Department of Optics, Hua Zhong University of Science and Technology. In 1984, he went to the Imperial College in London for graduate study and got his Ph.D. in 1988. After having been a postdoctoral fellow in Imperial College, he came back to China and worked at Sun Yat-sen University as a postdoctor, lecturer, associate research professor, and professor. He has been appointed as the dean of laser spectroscopy institute, the dean of the national key laboratory, and the chairman of school of science and technology at Sun Yat-sen University. Up to now, Prof. Zhou has established tight cooperation with a wide range of universities and institutes, including Max-Planck institute in Germany, Weizmann institute in Israel, Moscow University in Russia, Hong Kong Science and Technology University, and St. Andrews University in England.

Prof. Zhou’s research includes nonlinear frequency conversion of coherent optical field in UV spectral range, mode control of lasers, ultrafast nonlinear optics, and ultrafast laser spectroscopy with its applications. His academic achievements involve: he proposed new theories of mode locking, such as mode locking by moving mirrors; he realized phase matching in a variety of nonlinear optical processes; he succeeded in controlling and improving the output mode and the waveform of femtosecond laser by taking advantage of hollow waveguide in laser cavity; he studied the spectroscopic properties of metal ion probe used for complex molecules. Recently, he has been focusing on the study of ultrafast optoelectronic physics, technology and device fabrication. He has suggested and demonstrated ultrafast photonic switch based on active photonic crystals, photon storage based on band-gap solitons of ultrafast photonic signals, high-speed and high-efficiency ways of photonic energy conversion. Moreover, Prof. Zhou has proposed and realized a novel way of fabricating photonic crystals by altering the phase of optical field, which has been given intense attention around international colleagues.