105 research outputs found
The photocurrent generated by photon replica states of an off-resonantly coupled dot-cavity system
Transport properties of a quantum dot coupled to a photon cavity are
investigated using a quantum master equation in the steady-state regime. In the
off-resonance regime, when the photon energy is smaller than the energy spacing
between the lowest electron states of the quantum dot, we calculate the current
that is generated by photon replica states as the electronic system is pumped
with photons.Tuning the electron-photon coupling strength, the photocurrent can
be enhanced by the influences of the photon polarization, and the cavity-photon
coupling strength of the environment. We show that the current generated
through the photon replicas is very sensitive on the photon polarization, but
it is not strongly dependent on the average number of photons in the
environment.Comment: RevTeX, 9 pages with 10 included eps figure
- …