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9月16日外宾学术报告通知

来源： 发布时间：2011-09-07【字体：大 中 小】

题目：Fighting against diffraction: apodization and near field diffraction structures

单位：新加坡Data Storage Institute

姓名：Haifeng Wang博士（我所客座研究员）

时间：2011年9月16日（周五）下午2:00

地点：缘源溢智厅

欢迎大家参加！

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 所办公室

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　  2011年9月7日

附：学术报告和报告者简介

Abstract:

Diffraction is a natural phenomenon, which occurs when waves propagate or encounter an obstacle. Diffraction is also a fundamental aspect of modern optics: all imaging systems are diffraction systems. However, like a coin has two sides, diffraction also leads to some unfavorable effects, such as an increase in the size of a beam during propagation, and a limited minimal beam size after focusing. To overcome these disadvantages set by diffraction, many techniques have been developed by various groups, including apodization techniques to reduce the divergence of a laser beam and increase the resolution, and time reversal, STED microscopy, super lenses and optical antennas to obtain resolution down to nano-scale. This presentation concentrates on the diffraction of electromagnetic waves, and the ways to overcome beam divergence and the diffraction limit.

Resume of Dr.Haifeng Wang:

Haifeng Wang received his Ph.D. in 2001 from Shanghai Institute of Optics and fine Mechanics (SIOM), Chinese Academy of Sciences (CAS). After his PhD, he first worked as a post doctoral research fellow in Delft University of Technology (TUDelft), the Netherlands, from 2001 to 2003, where he studied surface plasmon, optical wave guide, vector diffraction theory and radially polarized light. This was followed by a stint at the Free University of Amsterdam (VUA) between 2003 and 2004, where his research was concerned with electromagnetic theory. He joined Data Storage Institute, Singapore in January 2005 where he now works as a Research Scientist. Haifeng Wang discovered the special effect of longitudinal polarization enhancement in binary phase elements, conceived and demonstrated a needle of longitudinally polarized light. His work has been published in journals such as Nature Photonics, Applied Physics Letters, Optical Society of America(OSA) journals, etc., and his research topics cover a wide range, including Nanoscopy, super-resolution bio-imaging, non-diffracting beams, photon spin, abnormal optical polarization engineering, optical antennas, microwave photonics and optical/magnetic data storage. He is a member of the OSA and also holds the position of Guest Professor at the SIOM.

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