Femtosecond near-field spin microscopy to digital magnetic heterostructures

J. Levy, V. Nikitin, J. M. Kikkawa, D. D. Awschalom, Nitin Samarth

Research output: Contribution to conferencePaperpeer-review

Abstract

A femtosecond-resolved low-temperature near-field scanning optical microscope is used to monitor the spatio-temporal evolution of excitonic spins in magnetic semiconductor quantum structures that are laterally patterned with a focused beam of Ga+ ions. Polarization-resolved photoluminescence (PL) images reveal a spin-dependent energy landscape in which the Zeeman splitting is diminished in implanted regions, and carrier and spin behavior is directly distinguished by sharp differences in intensity and polarization profits. Time-resolved measurements suggest that exciton diffusion acquires a spin-dependent component in the presence of a magnetic field. The data demonstrate fundamental limitations on the measurement of polarized PL from semiconductors in the near-field regime.

Original languageEnglish (US)
Pages25-26
Number of pages2
StatePublished - Jan 1 1996
EventProceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS - Anaheim, CA, USA
Duration: Jun 2 1996Jun 7 1996

Other

OtherProceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS
CityAnaheim, CA, USA
Period6/2/966/7/96

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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