The role of heavy-light-hole mixing on the optical initialization of hole spin in InAs quantum dots - Archive ouverte HAL
Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2013

The role of heavy-light-hole mixing on the optical initialization of hole spin in InAs quantum dots

Résumé

The initialization of a resident hole spin by the absorption of a circularly polarized light at resonance involves the formation of an excited state called a trion state. For a pure heavy hole, this optical initialization is mediated by the hyperfine electron-nuclear coupling in the trion state. We show here that for a mixed-hole spin an additional mechanism for the optical initialization appears, associated to `crossed transitions'; it becomes dominant and keeps a high level of hole spin polarization when the magnetic field screens the electron-nuclear interaction. Finally, using a simple model, we obtain a good theoretical agreement with pulsed pump-probe experiments.
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Dates et versions

hal-01229157 , version 1 (16-11-2015)

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F. Fras, Frédéric Bernardot, Benoît Eble, Mathieu Bernard, B. Siarry, et al.. The role of heavy-light-hole mixing on the optical initialization of hole spin in InAs quantum dots. Journal of Physics: Condensed Matter, 2013, 25 (20), pp.202202 ⟨10.1088/0953-8984/25/20/202202⟩. ⟨hal-01229157⟩
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