Coherent transfer of light polarization to electron spins in a semiconductor

Details Coherent transfer of light polarization to electron spins in a semiconductor Coherent transfer of light polarization to electron spins in a semiconductor

2007-10-20

arxiv.org/abs/0710.3847v1

Phys. Rev. Lett., 100, 096602 (2008).

Physics

Quantum Physics

4 pages. Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.100.096602

We demonstrate that the superposition of light polarization states is coherently transferred to electron spins in a semiconductor quantum well. By using time-resolved Kerr rotation we observe the initial phase of Larmor precession of electron spins whose coherence is transferred from light. To break the electron-hole spin entanglement, we utilized the big discrepancy between the transverse g-factors of electrons and light holes. The result encourages us to make a quantum media converter between flying photon qubits and stationary electron spin qubits in semiconductors.

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