Generation Of Correlated Photon Pair In A Silicon Microring Resonator

Correlated photon pairs are fundamental and essential resources in quantum information processing. As the quantum communication and the quantum computing are gaining more and more attention, it is of great importance to seek for an appropriate platform to produce correlated photon pairs. For decades, Scientists have successfully achieved the generation of correlated photon pairs using traditional materials such BBO crystals and nonlinear optical fibers. With its processing methods becoming more and more mature, along with the huge advantage in aspect of the light confinement and the nonlinear coefficient, silicon-based devices are concerned as a perfect platform for photon pair generation. Among them, a silicon microring is able to confine the light field further and increase the nonlinear effect due to its resonance. Thus it is significance to study the generation of correlated photon pairs through a silicon microring resonator.In this paper, firstly we obtain a series of parameters and principles of the microring resonator by studying it theoretically, which provides proper guide for the designing.Secondly we analyze the principle of the stimulated Four-wave mixing in a microring and its influencing factor. Finally the mechanism of the spontaneous Four-wave mixing in a microring is obtained referring to some literature, and its relationship with the stimulated process is analyzed, which is the base of the experiments followed.In the experiment section, combining the electronic beam lithography and the inductively coupled plasma etching, we produce microrings with excellent parameters.Then, using a photonic testing system, filters, along with single photon detectors and counters, we successfully observe the generation of photon pairs in the microring and compare it with the theory. Finally we propose and realize a silicon-graphene microring by transferring a monolayer graphene onto a silicon microring. We experimentally and theoretically prove that the hybrid structure can be used to increase the efficiency of Four-wave mixing and the generation rate of the photon pairs, which offers an idea for the subsequent on-chip quantum communication and quantum computing.