Spatiotemporal near-field spin microscopy in patterned magnetic heterostructures

J. Levy, V. Nikitin, J. M. Kikkawa, A. Cohen, N. Samarth, R. Garcia, D. D. Awschalom

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

Low temperature femtosecond-resolved near-field scanning optical microscopy is used to image excitonic spin behavior in locally disordered magnetic semiconductor heterostructures. A contrast between luminescence intensity and polarization profiles yields marked differences between carrier diffusion and spin transport over a spin-dependent energy landscape sharply defined by focused ion beam implantation. Space-time spectroscopies reveal a spin component to the exciton evolution in the presence of a magnetic field. Fundamental limitations on the measurement of circularly polarized luminescence in the near field are also demonstrated.

Original languageEnglish (US)
Pages (from-to)1948-1951
Number of pages4
JournalPhysical Review Letters
Volume76
Issue number11
DOIs
StatePublished - Mar 11 1996

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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