Research On Photon Blocking Based On Resonant Tunneling In Quantum Well Microcavity Systems

The preparation and manipulation of single-photon sources with high efficiency,stability,and high indivisibility are always the key links in quantum information processing because of its potential applications.Combining the quantum interference in coherence medium and high quanlity optical cavity,the response to a photon can be adjusted by whether there is a photon in the cavity or not.This is so called photon blockage;which is an effective way for single photon source.In this paper,we suggest a semiconductor GaAs symmetric quantum well-micro cavity structure,which combines the tunneling induced transparency and tunneling-induced-construtive interference associate with self-Kerr nonlinearity,and investigate the statistical optical properties.Our theoretical analysis and numerical calculation of the second-order correlation function demonstrate that the photon blockade occurs owing to tunneling-induced strong photon-photon interaction.Consequently,a stable and controllable single photon source could be achievable.The content of the thesis is mainly divided into the following parts:Part ?:After introducting the quantum interference phenomena such as electromagnetically induced transparency(EIT)and enhancement of nonlinear optical processes based on EIT,we discuss the photon blockade.A single quantum dot(exciton two-level system)coupled to the nanocavity system is used to illustrate the generation of the photon blockade.Part ?:The fundamental methods and basic concepts of quantum electrodynamics(QED)are given,for examples,the probability amplitude method,the Heisenberg method and J-C model.Part ?:This part is the core of this paper.A symmetric GaAs double quantum well-micro cavity is suggested for photon blockade based on tunneling induced transparency(TIT).After studying the linear and third-order nonlinear optical responses of the Q W,we investigate the second-order correlation function of the QW-micro cavity structure.Our theoretical analysis and numerical calculations show,in the present QWmicro cavity structure,that the antibunching effect is observable under appropriate conditions owing to the tunneling-induced strong photon-photon interaction.Thus the QW-micro cavity structure supports the stable and controllable single photon scourse.Part ?:In this part,we summarizes the research content of the thesis and looks forward to the huge development prospect of photon blocking in quantum information processing.