Interferometric control of spin-polarized electron populations at a metal surface observed by multiphoton photoemission

Aimo Winkelmann, Wen Chin Lin, Francesco Bisio, Hrvoje Petek, Jürgen Kirschner

研究成果: 雜誌貢獻文章同行評審

9 引文 斯高帕斯(Scopus)

摘要

In an interferometric pump-probe experiment, we demonstrate the phase tuning of the spin polarization of photoelectrons emitted in a three-photon process from Cu(001). A phase shift of π between delayed ultrafast circularly polarized light pulses can switch the spin polarization from ±20% to 40%. In the delay regime of overlapping pulses, we show the dominating role of optical interference effects in determining the spin polarization. For longer delays, we detect the influence of the coherent material response, manifested in both the final state electron population as well as the final state spin polarization.

原文英語
文章編號206601
期刊Physical Review Letters
100
發行號20
DOIs
出版狀態已發佈 - 2008 五月 22

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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