Details

Autor(en) / Beteiligte

• Widhalm, Alex
• Mukherjee, Amlan
• Krehs, Sebastian
• Sharma, Nandlal
• Kölling, Peter
• Thiede, Andreas
• Reuter, Dirk
• Förstner, Jens
• Zrenner, Artur

Titel

Ultrafast electric phase control of a single exciton qubit

Ist Teil von

• Applied physics letters, 2018-03, Vol.112 (11)

Erscheinungsjahr

2018

Link zum Volltext

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• We report on the coherent phase manipulation of quantum dot excitons by electric means. For our experiments, we use a low capacitance single quantum dot photodiode which is electrically controlled by a custom designed SiGe:C BiCMOS chip. The phase manipulation is performed and quantified in a Ramsey experiment, where ultrafast transient detuning of the exciton energy is performed synchronous to double pulse π/2 ps laser excitation. We are able to demonstrate electrically controlled phase manipulations with magnitudes up to 3π within 100 ps which is below the dephasing time of the quantum dot exciton.