Femtosecond near-field spin microscopy in digital magnetic heterostructures (invited)

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

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We have designed a low-temperature femtosecond-resolved near-field scanning optical microscope to study spatiotemporal excitonic spin behavior in magnetic semiconductor heterostructures. Local disorder introduced by focused-ion-beam implantation reduces the otherwise large Zeeman splittings in modest magnetic fields, creating a planar spin-dependent energy landscape for diffusing carriers. Near-field polarization-resolved static and femtosecond measurements map out excitonic spin behavior with ∼125 nm spatial resolution, revealing spin-dependent diffusion. We demonstrate the applicability of two distinct time-resolved techniques in the near field, and discuss limitations on the measurement of polarized luminescence from semiconductors in the near field.

Original languageEnglish (US)
Pages (from-to)6095-6100
Number of pages6
JournalJournal of Applied Physics
Volume79
Issue number8 PART 2B
StatePublished - Apr 15 1996

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near fields
microscopy
optical microscopes
implantation
spatial resolution
ion beams
disorders
luminescence
scanning
polarization
magnetic fields
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Levy, J., Nikitin, V., Kikkawa, J. M., Awschalom, D. D., & Samarth, N. (1996). Femtosecond near-field spin microscopy in digital magnetic heterostructures (invited). Journal of Applied Physics, 79(8 PART 2B), 6095-6100.
Levy, J. ; Nikitin, V. ; Kikkawa, J. M. ; Awschalom, D. D. ; Samarth, Nitin. / Femtosecond near-field spin microscopy in digital magnetic heterostructures (invited). In: Journal of Applied Physics. 1996 ; Vol. 79, No. 8 PART 2B. pp. 6095-6100.
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Levy, J, Nikitin, V, Kikkawa, JM, Awschalom, DD & Samarth, N 1996, 'Femtosecond near-field spin microscopy in digital magnetic heterostructures (invited)', Journal of Applied Physics, vol. 79, no. 8 PART 2B, pp. 6095-6100.

Femtosecond near-field spin microscopy in digital magnetic heterostructures (invited). / Levy, J.; Nikitin, V.; Kikkawa, J. M.; Awschalom, D. D.; Samarth, Nitin.

In: Journal of Applied Physics, Vol. 79, No. 8 PART 2B, 15.04.1996, p. 6095-6100.

Research output: Contribution to journalArticle

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AU - Nikitin, V.

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Levy J, Nikitin V, Kikkawa JM, Awschalom DD, Samarth N. Femtosecond near-field spin microscopy in digital magnetic heterostructures (invited). Journal of Applied Physics. 1996 Apr 15;79(8 PART 2B):6095-6100.