Subnanosecond single electron source in the time-domain

Abstract

We describe here the realization of a single electron source similar to single photon sources in optics. On-demand single electron injection is obtained using a quantum dot connected to the conductor via a tunnel barrier of variable transmission (quantum point contact). Electron emission is triggered by a sudden change of the dot potential which brings a single energy level above the Fermi energy in the conductor. A single charge is emitted on an average time ranging from 100 ps to 10 ns ultimately determined by the barrier transparency and the dot charging energy. The average single electron emission process is recorded with a 0.5 ns time resolution using a real-time fast acquisition card. Single electron signals are compared tosimulation based on scattering theory approach adapted for finite excitation energies.

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Cited by in corpus (11)

• Electron quantum optics in ballistic chiral conductors
• Current correlations of an on-demand electron source as an evidence of single particle emission
• Single electron quantum tomography in quantum Hall edge channels
• Current noise spectrum of a single particle emitter: theory and experiment
• Wigner function approach to single electron coherence in quantum Hall edge channels
• Single quasiparticle and electron nano-emitter in the fractional quantum Hall regime
• Taming electronic decoherence in 1D chiral ballistic quantum conductors
• Two-electron state from the Floquet scattering matrix perspective
• Unified time-dependent perturbative relations applied to spectroscopy through photo-drag current
• Processing quantum signals carried by electrical currents
• A high sensitivity ultra-low temperature RF conductance and noise measurement setup