Light Emitting And Nonlinear Characteristics Of Coupled Quantum Dot-Photonic Molecule System

In recent years, quantum information processing has been made great development in the theory and experiments. Research on it can break through the information security, speed, accuracy and capacity limits of the information system, so it is more and more highly regarded by the IT industry, the scientific community and the government. The development of quantum information processing is based on the application of quantum optical information processing devices and single-photon source device. And the use of coupled quantum dots-microcavity system that generates single photons is a hotspot currently.Cavity quantum electrodynamics is the subject that study the interaction between electromagnetic field in confined spaces and materials such as quantum dots, and one important physical system of the subject is the interaction of quantum dots-micro cavity system. The essence of light field is a quantum field, and there will be some new quantum effects in the process of the interaction between light and materials, quantum optics is a subject to study the quantum statistical properties of light field and interaction between light and matter using quantum theory. Photonic molecule is a pair of coupled optical microcavity, one microcavity of the coupled quantum dot-photonic molecule system contains a single quantum dot and the other is an empty cavity. The strong nonclassical light properties of the coupled quantum dot-two-mode cavity system comes from the combination of single quantum dot system with coupled single mode cavity under the pump. In coupled quantum dot and photonic molecular system the coupling interaction between the two parts will bring many new phenomenon. Aiming at the single photon sources generation and control of the coupled quantum dot-photonic molecular cavity system, this thesis focus on the main work as follows:Study on the effects on the system performance by the optical generation properties of double cavities system under laser driving, analyze quantum dot cavity coupling strength, the intercavity coupling strength and cavity detuning field dissipation. Put forward optimal scheme of the single photon emission system. Study on the nonlinear response of double-pulse excitation cavity system, and explore their applications in quantum information processing.The main purposes of this paper is to explore methods to prepare stable and high certainty photon source using coupled quantum point-photonic molecular system, and to analyze single photon source process in theory. Discuss the effects by system factors on the single photon source generation of the coupled quantum dot-cavity system. It provides a theory guide for the further preparation of single photon source in experiments.