Controlled cavity-QED using a photonic crystal waveguide-cavity system

Details Controlled cavity-QED using a photonic crystal waveguide-cavity system Controlled cavity-QED using a photonic crystal waveguide-cavity system

2009-04-28

arxiv.org/abs/0904.4469v3

Phys. Rev. B 80, 165128 (2009)

Physics

Optics

Scientific paper

10.1103/PhysRevB.80.165128

We introduce a photonic crystal waveguide-cavity system for controlling single photon cavity-QED processes. Exploiting Bloch mode analysis, and medium-dependent Green function techniques, we demonstrate that the propagation of single photons can be accurately described analytically, for integrated periodic waveguides with little more than four unit cells, including an output coupler. We verify our analytical approach by comparing to rigorous numerical calculations for a range of photonic crystal waveguide lengths. This allows one to nano-engineer various regimes of cavity-QED with unprecedented control. We demonstrate Purcell factors of greater than 1000 and on-chip single photon beta factors of about 80% efficiency. Both weak and strong coupling regimes are investigated, and the important role of waveguide length on the output emission spectra is shown, for vertically emitted emission and output waveguide emission.

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