Applied Physics Letters

Polarization transfer from photon to electron spin in g factor engineered quantum wells

Hideo Kosaka, Yasuyoshi Mitsumori, Yoshiaki Rikitake, Hiroshi Imamura

Published Mar 12, 2007• 9 citations

Abstract

The authors demonstrate polarization transfer from a photon to an electron spin intermediated by a light-hole exciton in a GaAs∕AlGaAs quantum well, which has an engineered electron g factor of less than 0.01 for an in-plane magnetic field. Negative spin polarization was clearly observed at the selective excitation of the light-hole exciton from two-color time-resolved Kerr rotation. This demonstration is a necessary step towards demonstrating coherence transfer from a photon to an electron spin, which is necessary for building a quantum repeater used for long distance quantum communications.

DOI: 10.1063/1.2709966

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