U.S.-Korea Cooperative Research on Electro-optic Field Sensors and Their Applications

9732516张本奖学金资助伦斯勒理工学院应用物理与天文物理系张锡成博士与韩国全北国立大学物理教育系Kang Hyun-Shik教授进行为期24个月的电光场传感器及其应用合作研究。最初的大部分活动将集中在向韩国合作者学习用于生长和制造高质量ZnTe晶体的技术。然后，这些电光晶体将用作宽带场传感器，用于自由传播的超宽带脉冲太赫兹电磁波（THz波束）的相干测量。目前的合作将为张博士的研究增加一个国际维度，目前由美国国家科学基金会（NSF）资助。ecs - 9701486。这位美国研究人员希望这次新的合作对他在国家科学基金会资助下正在进行的研究有益。PI报告说，ZnTe传感器非常敏感，它消除了金属天线和电气连接的需要，这些金属天线和电气连接会干扰电磁环境的精确测量和表征。其他优点包括通过降低对电噪声拾取的敏感性来提高测量精度，从而消除了传感器头部对电力的需求；传感器头可以放置在敌对或偏远地区；该设备的紧凑性允许在小腔内进行测量。该项目与美韩合作科学项目的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美韩科学家和工程师之间的合作水平。该项目将为一名美国研究生在基础和技术上重要的光子学和光电子学研究领域提供国际培训和经验。韩国的参与得到了韩国科学工程财团（KOSEF）的支持。* * *

9732516 Zhang This award provides funds to permit Dr. Xi-Cheng Zhang, Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, to pursue with Professor Hyun-Shik Kang, Department of Physics Education, Chonbuk National University, Korea, for 24 months, a program of cooperative research on electro-optic field sensors and their applications. Much of the activity initially will concentrate on learning from the Korean collaborator techniques used for growth and fabrication of high quality ZnTe crystals. These electro-optic crystals then will be used as broad band field sensors for the coherent measurement of freely-propagating ultra wideband pulsed terahertz electromagnetic waves (THz beams). The present collaboration will add an international dimension to Dr. Zhang's research presently funded under NSF Grant No. ECS-9701486. The U.S. researcher expects this new collaboration to be beneficial to ongoing research under his NSF grant. The PI reports that the ZnTe sensor is so sensitive that it eliminates the need for metallic antennas and electrical connections that can interfere with accurate measurement and characterization of the electromagnetic environment. Other benefits include improved measurement accuracy by reducing susceptibility to electrical noise pick up, thus, eliminating the need for electrical power at the sensor head; the sensor head can be placed in hostile or remote areas; and the device's compactness allows measurement in small cavities. This project is relevant to the objectives of the U.S.-Korea Cooperative Science Program which seeks to increase the level of cooperation between U.S. and Korean scientists and engineers through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit. This project will provide international training and experience for a U.S. graduate student in a fundamentally and technologically significant area of ph otonics and optoelectronics research.. Korean participation is supported by the Korea Science and Engineering Foundation (KOSEF). ***