Abstract
Single excitons in semiconductor microcavities represent a solid state and scalable platform
for cavity quantum electrodynamics, potentially enabling an interface between flying
(photon) and static (exciton) quantum bits in future quantum networks. While both singlephoton
emission and the strong coupling regime have been demonstrated, further progress
has been hampered by the inability to control the coherent evolution of the cavity quantum
electrodynamics system in real time, as needed to produce and harness charge–photon
entanglement. Here using the ultrafast electrical tuning of the exciton energy in a photonic
crystal diode, we demonstrate the dynamic control of the coupling of a single exciton to a
photonic crystal cavity mode on a sub-nanosecond timescale, faster than the natural lifetime
of the exciton. This opens the way to the control of single-photon waveforms, as needed
for quantum interfaces, and to the real-time control of solid-state cavity quantum electrodynamics
systems.
Original language | English |
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Pages (from-to) | 5786-1/6 |
Number of pages | 6 |
Journal | Nature Communications |
Volume | 5 |
DOIs | |
Publication status | Published - 2014 |