Swing-Up of Quantum Emitter Population Using Detuned Pulses

Thomas K. Bracht*, Michael Cosacchi, Tim Seidelmann, Moritz Cygorek, Alexei Vagov, V. Martin Axt, Tobias Heindel, Doris E. Reiter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)
30 Downloads (Pure)


The controlled preparation of the excited state in a quantum emitter is a prerequisite for its usage as a single-photon source - a key building block for quantum technologies. In this paper, we propose a coherent excitation scheme using off-resonant pulses. In the usual Rabi scheme, these pulses would not lead to a significant occupation. This is overcome by using a frequency-modulated pulse to swing up the excited-state population. The same effect can be obtained using two pulses with different strong detunings of the same sign. We theoretically analyze the applicability of the scheme to a semiconductor quantum dot. In this case, the excitation is several millielectronvolts below the band gap, i.e., far away from the detection frequency, allowing for easy spectral filtering, and does not rely on any auxiliary particles such as phonons. Our scheme has the potential to lead to the generation of close-to-ideal photons.

Original languageEnglish
Article numberA208
JournalPRX Quantum
Issue number4
Publication statusPublished - 17 Dec 2021

ASJC Scopus subject areas

  • General Physics and Astronomy
  • General Computer Science
  • Applied Mathematics
  • Mathematical Physics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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