Ultrafast electric phase control of a single exciton qubit

A. Widhalm, A. Mukherjee, S. Krehs, N. Sharma, P. Kölling, A. Thiede, D. Reuter, J. Förstner, A. Zrenner, Applied Physics Letters 112 (2018) 111105.

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Abstract
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 p/2 ps laser excitation. We are able to demonstrate electrically controlled phase manipulations with magnitudes up to 3p within 100 ps which is below the dephasing time of the quantum dot exciton.
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Journal Title
Applied Physics Letters
Volume
112
Issue
11
Page
111105
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Widhalm A, Mukherjee A, Krehs S, et al. Ultrafast electric phase control of a single exciton qubit. Applied Physics Letters. 2018;112(11):111105. doi:10.1063/1.5020364
Widhalm, A., Mukherjee, A., Krehs, S., Sharma, N., Kölling, P., Thiede, A., … Zrenner, A. (2018). Ultrafast electric phase control of a single exciton qubit. Applied Physics Letters, 112(11), 111105. https://doi.org/10.1063/1.5020364
@article{Widhalm_Mukherjee_Krehs_Sharma_Kölling_Thiede_Reuter_Förstner_Zrenner_2018, title={Ultrafast electric phase control of a single exciton qubit}, volume={112}, DOI={10.1063/1.5020364}, number={11}, journal={Applied Physics Letters}, author={Widhalm, Alex and Mukherjee, Amlan and Krehs, Sebastian and Sharma, Nandlal and Kölling, Peter and Thiede, Andreas and Reuter, Dirk and Förstner, Jens and Zrenner, Artur}, year={2018}, pages={111105} }
Widhalm, Alex, Amlan Mukherjee, Sebastian Krehs, Nandlal Sharma, Peter Kölling, Andreas Thiede, Dirk Reuter, Jens Förstner, and Artur Zrenner. “Ultrafast Electric Phase Control of a Single Exciton Qubit.” Applied Physics Letters 112, no. 11 (2018): 111105. https://doi.org/10.1063/1.5020364.
A. Widhalm et al., “Ultrafast electric phase control of a single exciton qubit,” Applied Physics Letters, vol. 112, no. 11, p. 111105, 2018.
Widhalm, Alex, et al. “Ultrafast Electric Phase Control of a Single Exciton Qubit.” Applied Physics Letters, vol. 112, no. 11, 2018, p. 111105, doi:10.1063/1.5020364.
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