A Study Of Slow Light Of Active Photonic Band Gap Bragg Structure

In the current information field, light is playing an increasingly important role. If thespeed of light is slow, in some ways will have better optical properties, such as its applicationin optical buffer and light sensor, their storage capacity and accuracy will increase greatly. So,how to realize the slow light and its application in optical communication become one of thehot research problems.we investgate an active photonic band gap structure of bragg through quantum controlrealization of slow light method. This kind of structure due to the quantum properties of thematerials, have apparently excitonic effects, by using non resonance excitation optical Starkeffect, drive the nonlinear physical mechanism, reallize all-optical quantum control of slowlight. If the quantum materials characteristic frequency (spin exciton resonance frequencyand material bragg frequency) in the reflection spectrum formed a transmission window,assuming that the spectrum of the optical pulses in the middle band (i.e. between the spinexciton resonance frequency and bragg frequency of materials), it can be changed throughchanging the exciton resonance frequency, control the group velocity of light, realize the slowlight.Through the calculation energy level structure of quantum well material structures, usingthe transfer matrix method deduced bragg material energy band relations, study the ideal(light quantum irradiation broadening) periodic quantum materials energy band structure.Study the quantum well optical Stark effect of slow light process in the case of nonresonance.Using the transmission matrix to calculate material reflection spectrum. And discuss thequantum dot structure of bragg slow light condition, using the transmission matrix methodand its model is established, and study its properties. From the theoretical calculation, we canthis structure can achieve all-optical control, time control for ps magnitude, quantum dotstructure can realize the room temperature control, the speed of light is very slow, shows thegreat superiority.