沈铁汉教授报告
报告题目：Stokes polarimetry- its principles, practices and our early stage enterprising activities
报 告 人：英国索尔福德大学 沈铁汉教授
时 间：2015年03月 11日（星期 三）早晨9:30
地 点： 物理学院三楼报告厅
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物理学院 光子学与光子技术研究所
2015年 03 月04日
报告内容简介：
The polarisation states of light have fascinated scientists for centuries. Sir Isaac Newton asked in Question 26 of Opticks: "Have not the rays of light several sides, endued with several original properties?" This is an elegant, albeit a bit old fashioned, way of saying light has polarisation and its scattering and reflection properties depend on the alignment of the light beam not just its direction of travel.
Stokes parameters fully characterise the polarisation state of light in an experimentally accessible manner. Modern photoelastic modulator (PEM) based Stokes polarimetry offers a very high sensitivity which is particularly suitable, for instance, for the investigation of the magneto-optical properties of nanostructured magnetic materials. In this talk, a robust methodology recently developed, which utilizes a dual PEM setup, is described. The principles of Stokes polarimetry, practical implementations and potential future challenges are examined. The recent development of a polarimetric imaging system will also be discussed.
报告人简介：
Dr. Tiehan Shen’s research career has taken him from Peking University (BSc 1982), to Cambridge (PhD 1988), then to Cardiff (PDRA), Leeds (Lectureship in Physics, 1992) and Salford (Readership in Magnetism, 2000). In recent years he has been interested in the fabrication and characterisation of nanostructured materials, in particular magnetic nanostructures and their magneto-optical characteristics. A ‘spin off’ from the research activities is the development of a novel polarisation microscope for application in life science research, which is being actively pursued through a spin out company, Optimum Imaging Ltd. He has co-authored over seventy publications in peer-reviewed journals. The field of research covered by these works falls broadly within Condensed Matter Physics and Functional Materials.