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セミナーのお知らせ: Prof. Károly Tőkési (Institute for Nuclear Research (Atomki) Debrecen, Hungary, EU)
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TACMIコンソーシアムオープンセミナー
日時：2019年10月31日（木）15:00～16:00 / Date & Time : 15:00-16:00 on Thursday, October 31, 2019
場所：東京大学本郷キャンパス
工学部８号館地下１階８５号講義室
/
Venue : Lecture Room 85, 1st basement, Engineering Bldg. #8, Hongo Campus, The University of Tokyo
Speaker： Prof. Károly Tőkési
(Institute for Nuclear Research (Atomki) Debrecen, Hungary, EU)
Title : Time-resolved photoemission and collective excitations by attosecond streaking technique – "Watching quantum physics in real time"
Abstract
Time-resolved photoemission experiments employing attosecond streaking of electrons emitted by an extended ultraviolet pump pulse and probed by a few-cycle near-infrared pulse found a time delay of about 100 as between photoelectrons from the conduction band and those from the 4f core level of tungsten. We present a microscopic simulation of the emission time and energy spectra employing a classical transport theory. Our calculations reproduced well both the emission spectra and streaking images. We found delay times near the lower bound of the experimental data.
Moreover the time delay of the plasmon satellites relative to the main line can be resolved in attosecond streaking experiments. Time-resolved photoemission thus provides the key to discriminate between intrinsic and extrinsic plasmon excitation. We demonstrate the determination of the branching ratio between intrinsic and extrinsic plasmon generation for simple metals.
使用言語：英語 / Language : English
紹介教員：石川顕一 教授 (工学系研究科原子力国際専攻)
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