Leon C. Camenzind, Simon Geyer, et al.
Nature Electronics
A biexciton in a semiconductor quantum dot is a source of polarization-entangled photons with high potential for implementation in scalable systems. Several approaches for nonresonant, resonant, and quasiresonant biexciton preparation exist, but all have their own disadvantages; for instance, low fidelity, timing jitter, incoherence, or sensitivity to experimental parameters. We demonstrate a coherent and robust technique to generate a biexciton in an InGaAs quantum dot with a fidelity close to 1. The main concept is the application of rapid adiabatic passage to the ground-state-exciton-biexciton system. We reinforce our experimental results with simulations which include a microscopic coupling to phonons.
Leon C. Camenzind, Simon Geyer, et al.
Nature Electronics
Simon Geyer, Bence Hetényi, et al.
Nature Physics
Timo Kaldewey, Andreas V. Kuhlmann, et al.
Nature Photonics
Andreas Fuhrer, M. Aldeghi, et al.
IEDM 2022