title: High-Fidelity and Ultrafast Initialization of a Hole Spin Bound to a Te Isoelectronic Center in ZnSe.
abstract: We demonstrate the optical initialization of a hole-spin qubit bound to an isoelectronic center (IC) formed by a pair of Te impurities in ZnSe, an impurity-host system providing high optical homogeneity, large electric dipole moments, and potentially advantageous coherence times. The initialization scheme is based on the spin-preserving tunneling of a resonantly excited donor-bound exciton to a positively charged Te IC, thus forming a positive trion. The radiative decay of the trion within less than 50 ps leaves a heavy hole in a well-defined polarization-controlled spin state. The initialization fidelity exceeds 98.5% for an initialization time of less than 150 ps.
authors: Polytechnique Montréal, Montréal, Quebec H3C 3A7, Canada.
authors: P
authors: P
authors: St-Jean
authors: Polytechnique Montréal, Montréal, Quebec H3C 3A7, Canada.
authors: G
authors: G
authors: Éthier-Majcher
authors: Nanophysics and Semiconductor Group, Institut Néel, CEA/CNRS/Université Joseph Fourier, 25 rue des Martyrs, 38042 Grenoble, France.
authors: R
authors: R
authors: André
authors: Polytechnique Montréal, Montréal, Quebec H3C 3A7, Canada.
authors: S
authors: S
authors: Francoeur