Slitless time-resolved ARPES
Project/Area Number |
19KK0350
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Research Category |
Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
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Research Institution | The University of Tokyo |
Principal Investigator |
Ishida Yukiaki 東京大学, 大学院理学系研究科(理学部), 特任講師 (30442924)
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Project Period (FY) |
2020 – 2022
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
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Keywords | 角度分解光電子分光 / 仕事関数 / ファイバーレーザー / 表面第2高調波 / 光電子分光法 / フェムト秒域ファイバーレーザー / 表面第2高調波 / 時間分解光電子分光 / レーザー高調波 / 第二高調波発生 / 超高速現象 / 円二色性 / 光電子分光 / レーザー |
Outline of Research at the Start |
2015年頃に光電子分析器に技術革命がおきた。従来の分析器によって一度に取り込める光電子はせいぜい1次元のスリットに入射するものであったが、このスリットないしその概念がなくなったものが登場し、2次元の立体角に放出される光電子を一度に取り込むことが可能となった。このスリットレス分析器にレーザー光源を組み込むことで、新しい時間分解光電子分光装置を建設する。スリットレス化によって初めて可能となる非線形光電子現象の探索や超高速非平衡現象の精査を実現する。
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Outline of Final Research Achievements |
In the ISSP-CCES Joint Research lab located at Seoul National University, we achieved the followings: (1) Two time-resolved ARPES systems developed at ISSP were transferred to the Joint-Research lab; (2) We succeeded in developing a compact femto-fiber laser system that operates in an ordinary laboratory environment; thereby we docket the laser system to a slitless photoelectron analyze and demonstrated a new method by which work function can be measured with a precision better than 1-2 orders of magnitude than conventional methods; (3) By utilizing a slitless analyzer and circularly-polarized laser harmonics, we investigated the circular dichroism in the photoelectron solid angular distribution, and formulated the pattern classification. (4) We developed a compact second harmonic generation detector and observed some novel first-order structural transition occurring in a transition-metal chalcogenide; (4) We developed a compact 1 MHz femto-fiber laser system that operates on a hand.
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Academic Significance and Societal Importance of the Research Achievements |
本課題で得られた成果は、超高速分光学、レーザー技術、材料科学の領域に渡って意義をもち、ISSP-CCESの共同ラボにおけるさらなる国際共同研究を促進する。本研究期間中に開発した小型で汎用性のあるフェムト秒域パルスレーザー光源や装置は、光電子分光に限らず様々な科学・技術分野で進歩とイノベーションを推進すると期待される。
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Report
(4 results)
Research Products
(7 results)
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[Journal Article] Ultrafast probes of photovoltage and two-dimensional electron gas in the topological insulator Bi2Te3 by angle-resolved photoemission and terahertz spectroscopy2022
Author(s)
Bumjoo Lee, Yukiaki Ishida, Jonghyeon Kim, Jinsu Kim, Na Hyun Jo, So Yeun Kim, Inho Kwak, Min-Cheol Lee, Kyungwan Kim, Jae Hoon Kim, Myung-Hwa Jung, Shik Shin, Tae Won Noh, and Hyunyong Choi
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Journal Title
Physical Review B
Volume: 106
Issue: 19
Pages: 195430-195430
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Effect of the sample work function on alkali metal dosing induced electronic structure change2021
Author(s)
Saegyeol Jung, Yukiaki Ishida, Minsoo Kim, Masamichi Nakajima, Shigeyuki Ishida, Hiroshi Eisaki, Woojae Choi, Yong Seung Kwon, Jonathan Denlinger, Toshio Otsu, Yohei Kobayashi, Soonsang Huh, Changyoung Kim
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Journal Title
Journal of Electron Spectroscopy and Related Phenomena
Volume: 249
Pages: 147045-147045
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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