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Generating single photons at GHz modulation-speed using electrically controlled quantum dot microlenses
A. Schlehahn, R. Schmidt, C. Hopfmann +7
We report on the generation of single-photon pulse trains at a repetition rate of up to 1 GHz. We achieve this high speed by modulating the external voltage applied on an electrica…
Deterministic Coherent Writing of a Long-Lived Semiconductor Spin Qubit Using One Ultrafast Optical Pulse
I. Schwartz, D. Cogan, E. R. Schmidgall +4
We use one single, few-picosecond-long, variably polarized laser pulse to deterministically write any selected spin state of a quantum dot confined dark exciton whose life and cohe…
All-Optical Depletion of Dark Excitons from a Semiconductor Quantum Dot
E. R. Schmidgall, I. Schwartz, D. Cogan +4
Semiconductor quantum dots are considered to be the leading venue for fabricating on-demand sources of single photons. However, the generation of long-lived dark excitons imposes s…