Nonlinear photon transport in a semiconductor waveguide-cavity system containing a single quantum dot

Frank Bello, D. Sanvitto, Fabrice P. Laussy +6 more

Stephen Hughes, C. Roy

We present a semiconductor master equation technique to study the input/output characteristics of coherent photon transport in a semiconductor waveguide-cavity system containing a single quantum dot. We use this approach to investigate the effects of photon propagation and anharmonic cavity-QED for various dot-cavity interaction strengths, including weakly-coupled, intermediately-coupled, and strongly-coupled regimes. We demonstrate that for mean photon numbers much less than 0.1, the commonly adopted weak excitation (single quantum) approximation breaks down, even in the weak coupling regime. As a measure of the multiphoton correlations, we compute the Fano factor and the correlation error associated with making a semiclassical approximation. We also explore the role of electron--acoustic-phonon scattering and find that phonon-mediated scattering plays a qualitatively important role on the light propagation characteristics. As an application of the theory, we simulate a conditional phase gate at a phonon bath temperature of 20 K in the strong coupling regime.

Shuo Sun, Kai Müller

Ling-Ming Gu

We theoretically investigate the single photon transport in a coupled resonator waveguide embedded in a semiconductor quantum dot with a V-type system. The transmission and reflection amplitudes are obtained by using a discrete coordinates approach. It is shown that the photon transport properties can be controlled by the energy detuning between the two excited states of the V-type system, and the coupling strength between the photon and the V-type system. We also compare the single photon transport properties in the waveguide with sinusoidal and linear dispersion relations.

Wei‐Bin Yan, Heng Fan

We study controllable single-photon transport in a one-dimensional waveguide with a nonlinear dispersion relation coupled to a three-level emitter in a cascade configuration. An extra cavity field is introduced to drive one of the level transitions of the emitter. In the resonance case, when the extra cavity does not contain photons, the input single photon will be reflected; when the cavity contains one photon, the full transmission of the input single photon can be obtained. In the off-resonance case, the single-photon transport can also be controlled by the parameters of the cavity. Therefore, we show that single-photon transport can be controlled by an extra cavity field.

程木田, 叶根龙, 纵卫卫 +1 more