Fast optical preparation, control, and readout of a single quantum dot spin

• Autor(a) principal: Ramsay, A. J.
• Data de Publicação: 2008
• Outros Autores: Boyle, S. J., Kolodka, R. S., Oliveira, J. B.B. [UNESP], Skiba-Szymanska, J., Liu, H. Y., Hopkinson, M., Fox, A. M., Skolnick, M. S.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevLett.100.197401; http://hdl.handle.net/11449/225165

We propose and demonstrate the sequential initialization, optical control, and readout of a single spin trapped in a semiconductor quantum dot. Hole spin preparation is achieved through ionization of a resonantly excited electron-hole pair. Optical control is observed as a coherent Rabi rotation between the hole and charged-exciton states, which is conditional on the initial hole spin state. The spin-selective creation of the charged exciton provides a photocurrent readout of the hole spin state. © 2008 The American Physical Society.