Ultrafast optical spin injection into image-potential states of Cu(001)

A. Winkelmann, F. Bisio, R. Ocaña, W. C. Lin, M. Nývlt, H. Petek, J. Kirschner

研究成果: 雜誌貢獻文章同行評審

17 引文 斯高帕斯(Scopus)

摘要

We report the observation of a net spin polarization in the n=1 image-potential state at the Cu(001) surface. The spin polarization is achieved by spin-selective multiphoton excitation of electrons from the spin-orbit split Cu d bands to the image-potential state using circularly polarized ultrafast light pulses. We show that by tuning the exciting photon energy, we can adjust the resonant coupling of the image-potential state to d bands of different double-group symmetry. This allows us to tune the spin polarization injected into the image-potential state.

原文英語
文章編號226601
期刊Physical Review Letters
98
發行號22
DOIs
出版狀態已發佈 - 2007 五月 31

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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