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1091-專題演講-1091104-莊子弘(同步輻射奈米科學)

演講活動
張貼人:李明芳公告日期:2020-08-18
  
Time1091104 (Wed.) 14:20~16:20
SpeakerProf.莊子弘(CHUANG, Tzu-Hung)
國家同步輻射研究中心奈米科學小組/Nano Science Group, National Synchrotron Radiation Research Center
TitlePhotoemission electron microscopy at Taiwan Light Source and Taiwan Photon Source
AbstractThe technical capabilities and scientific opportunities of both full-field X-ray photoemission electron microscopy (PEEM) end-stations at Taiwan Light Source (TLS) and Taiwan Photon Source (TPS) of NSRRC will be introduced. Several investigations for two-dimensional materials will be also discussed.
The Photoelectron Related Image and Nano-Spectroscopy (PRINS) end-station at the TPS 27A2 will host a photoelectron microscope that aims to work on photoelectron-related imaging and nano-scale spectroscopy through the combination of an imaging-type electron column integrated with a hemispherical electron energy analyzer and an imaging spin filter. The microscope is able to conduct full-field imaging by collecting photoelectrons in either real-space or momentum-space with spin contrast.
 
Taking advantage of an elliptically polarized undulator (EPU) photon source, i.e. the energy and polarization of the X-rays are both tunable, and powering by an in-house designed active-mirror plane grating monochromator, which delivers soft X-rays in a range of 90-3000 eV, the PRINS microscope has multiple capabilities, such as (1) X-ray absorption spectroscopy (XAS)-based and X-ray magnetic circular dichroism (XMCD)-based real-space imaging to obtain element-resolved mapping or spin-texture information, (2) X-ray photoelectron spectroscopy (XPS)-based real- and momentum-space imaging to obtain spatially-resolved chemical state mapping and band-structure imaging, (3) spin-resolved band structure measurement when the imaging spin filter is introduced, and (4) micro-area spectroscopy (XAS, XPS, and angle-resolved photoelectron spectroscopy) extracted from a series of images measured at different kinetic energies of the electrons.
The photoelectron microscope system including a hexapod sample manipulator, imaging spin filter, and ultraviolet light sources (mercury and helium) is expected to arrive at TPS before June 2021. A sample preparation chamber with standard surface science characterization capabilities, including the ion sputtering, low energy electron diffraction, Auger electron spectroscopy, and electron-assisted thin-film deposition, will be connected to the main photoelectron microscope system to enable in-situ experiments. The sample preparation system will be initiated and tested at the beginning of 2021. Technical capabilities and scientific opportunities of the end-station will be discussed in the talk, and the current status will also be reported. 
PlaceB101, Gongquan Campuses, NTNU


最後修改時間:2020-11-02 PM 3:48

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單位簡介

本系的重點研究領域包括:凝態物理、光電與奈米科學、高能與粒子物理、軟凝態物理與生物物理、原分子光學物理、及物理科學教育等。本系前身為臺灣省立師範學院理化系物理組,成立於民國三十五年(1946年)本校創校之始。民國五十一年(1962年)本系獨立成系,民國六十三年(1974年)成立物理研究所碩士班,民國八十年(1991年)成立研究所博士班。長久以來,本系肩負著培育臺灣中等學校物理科師資的重任,但也不忘在物理學術研究上求新求進步。至今本系培育出的學術人才已有一位中研院院士及近百位中研院研究員及大學教授,各行各業的高科技人材更是不勝枚舉。民國八十三年師資培育法改制後,本系已升級為尖端學術研究、科技應用研發、及中學師資培育三者齊備的系所。

  • 國立臺灣師範大學物理系系友會
  • 系友會線上小額捐款
  • 徐有庠盃-臺灣青年學生物理辯論競賽
  • 國際物理奧林匹亞競賽
  • 公用場地與儀器設施預約系統
  • 學生實習專區
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