Ultrafast Manipulation of Electron Spin Coherence

  title={Ultrafast Manipulation of Electron Spin Coherence},
  author={Jay A. Gupta and Robert G. Knobel and Nitin Samarth and David D. Awschalom},
  pages={2458 - 2461}
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… Expand
A recently developed technique is reviewed with the potential for all-optical coherent control over electron spins in semiconductors. In these experiments, ultrafast laser pulses "tip" electron spinsExpand
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Resonant Spin Amplification in n-Type GaAs
Extended electron spin precession in $n$-type GaAs bulk semiconductors is directly observed by femtosecond time-resolved Faraday rotation in the Voigt geometry. Synchronous optical pumping of theExpand
Ultrafast optical pulses are used to initiate and measure free-induction decays of coherent conduction electron spins and of embedded magnetic ${\mathrm{Mn}}^{2+}$ ions in a series ofExpand
Spin coherence in semiconductor quantum dots
Department of Chemistry, University of California, Berkeley, California 94720~Received 24 November 1998!Femtosecond-resolved Faraday rotation is used to probe spin dynamics in chemically synthesizedExpand
Exciton spin polarization in magnetic semiconductor quantum wires
Electron-beam lithography and wet etching techniques are used to laterally pattern ZnSe/(Zn,Cd,Mn)Se single quantum wells into magnetically active quantum wires with widths ranging from 20 to 80 nm.Expand
Light-shift-induced spin echoes in a J=1/2 atomic ground state.
  • Rosatzin, Suter, Mlynek
  • Medicine, Physics
  • Physical review. A, Atomic, molecular, and optical physics
  • 1990
This work has demonstrated the occurrence of sublevel or spin echoes in inhomogeneously broadened atomic ground states by applying a sequence of two optically resonant light pulses. Expand
Time-resolved two-dimensional spectroscopy of optically driven atomic sublevel coherences.
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We propose an implementation of a universal set of one- and two-quantum-bit gates for quantum computation using the spin states of coupled single-electron quantum dots. Desired operations areExpand
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