Hybrid Acousto-Optical Spin Control in Quantum Dots
M. Kuniej, P. Machnikowski, M. Gawełczyk
We have proposed a hybrid acousto-optical spin control method that circumvents the limitations of very weak spin-mechanical coupling and effectively introduces acoustic spin rotation to QDs. We show that combining continuous-wave detuned optical coupling to a trion state and acoustic modulation results in spin rotation around an axis defined by the acoustic field. We demonstrate also an acoustic decoupling pulse sequence that mitigates quasistatic noise effects leading to nearly perfect fidelity of operation.