Ultrafast manipulation of electron spin coherence

J. A. Gupta, R. Knobel, N. Samarth, D. D. Awschalom

Research output: Contribution to journalArticle

230 Scopus citations

Abstract

A technique is developed with the potential for coherent all-optical control over electron spins in semiconductors on femtosecond time scales. The experiments show that optical "tipping" pulses can enact substantial rotations of electron spins through a mechanism dependent on the optical Stark effect. These rotations were measured as changes in the amplitude of spin precession after optical excitation in a transverse magnetic field and approach π/2 radians. A prototype sequence of two tipping pulses indicates that the rotation is reversible, a result that establishes the coherent nature of the tipping process.

Original languageEnglish (US)
Pages (from-to)2458-2461
Number of pages4
JournalScience
Volume292
Issue number5526
DOIs
StatePublished - Jun 29 2001

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Dive into the research topics of 'Ultrafast manipulation of electron spin coherence'. Together they form a unique fingerprint.

  • Cite this

    Gupta, J. A., Knobel, R., Samarth, N., & Awschalom, D. D. (2001). Ultrafast manipulation of electron spin coherence. Science, 292(5526), 2458-2461. https://doi.org/10.1126/science.1061169