Details

Autor(en) / Beteiligte

• Kim, Danny
• Economou, Sophia E
• Bădescu, Stefan C
• Scheibner, Michael
• Bracker, Allan S
• Bashkansky, Mark
• Reinecke, Thomas L
• Gammon, Daniel

Titel

Optical spin initialization and nondestructive measurement in a quantum dot molecule

Ist Teil von

• Physical review letters, 2008-12, Vol.101 (23), p.236804-236804, Article 236804

Ort / Verlag

United States

Erscheinungsjahr

2008

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The spin of an electron in a self-assembled InAs/GaAs quantum dot molecule is optically prepared and measured through the trion triplet states. A longitudinal magnetic field is used to tune two of the trion states into resonance, forming a superposition state through asymmetric spin exchange. As a result, spin-flip Raman transitions can be used for optical spin initialization, while separate trion states enable cycling transitions for nondestructive measurement. With two-laser transmission spectroscopy we demonstrate both operations simultaneously, something not previously accomplished in a single quantum dot.