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arXiv · 1506.04724

Taking advantage of light- and heavy-hole trions for optical spin initialization, control and readout

G. Éthier-Majcher·P. St-Jean·S. Francoeur
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Abstract

Optical control strategies in semiconductor nanostructures have almost exclusively relied on heavy-hole exciton and trion states. In the first part of this letter, we show that light-hole trions provide the missing ressource for consolidating all single qubit operations in a mutually compatible magnetic field configuration: electron spin initialization and control can be achieved through light-hole trion states and cycling transition is provided by heavy-hole trion states. In the second part, we experimentally demonstrate that pairs of nitrogen atoms in GaAs exhibiting a Cs symmetry bind both light- and heavy-hole excitons and negative trions. A detailed analysis of the fine structure reveals that that trion states provide the lambda level structure necessary for fast initialization and control along with energetically-protected cycling transition compatible with single-shot readout.

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G. Éthier-Majcher, P. St-Jean, S. Francoeur. 2015-06-15. Taking advantage of light- and heavy-hole trions for optical spin initialization, control and readout. https://arxiv.org/abs/1506.04724

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