在耦合量子点中实现自发辐射相干效应的研究

项目名称： 在耦合量子点中实现自发辐射相干效应的研究

项目编号： No.11304308

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 田思聪

作者单位： 中国科学院长春光学精密机械与物理研究所

项目金额： 30万元

中文摘要： 自发辐射相干可以改变介质的吸收和自发辐射等光学性质，在新型光学器件、量子信息等领域有重要的应用价值。然而它对介质有着极为苛刻的要求，在原子系统中不易实现。在耦合量子点材料中，可以通过隧穿效应模拟自发辐射相干，具有实际的应用前景。本项目拟在耦合量子点系统中实现自发辐射相干效应，开展如下研究： 1. 研究用MOCVD和电子束曝光设备制备耦合量子点的技术，表征量子点样品形貌特性； 2. 通过隧穿效应模拟自发辐射相干，研究自发辐射相干对耦合量子点系统的共振荧光光谱的影响，证明自发辐射相干效应； 3. 研究在耦合量子点中利用自发辐射相干实现粒子数转移、探测场增益和增强Kerr非线性等相关现象。 通过以上研究，本项目将拓展自发辐射相干在量子点光学器件和量子信息等领域的应用价值，推动自发辐射相干从理论研究走向实际应用。

中文关键词： 自发辐射相干；双暗共振；量子干涉；耦合量子点；隧穿诱导透明

英文摘要： Spontaneously generated coherence (SGC) gives rise to a variety of novel quantum effects, such as absorption and spontaneous emission. Therefore it may find applications in many fields, examples are novel optical devices and quantum information. However, the realization of this quantum coherence needs very rigorous requirements which hinder its application. By using electron tunneling, we will simulate SGC in coupled quantum dots system, so that the effects related to SGC will be realized. We will carry out the following investigations: 1. Investigate the fabrication and wafer growth of coupled quantum dots by MOCVD and E-Beam and analyze the structures of the sample; 2. Realize SGC using tuning in the coupled quantum dots and observe SGC effect on the resonance fluorescence spectrum in the coupled quantum dots; 3. Investigate the state pupolation, gain and Kerr nonlinearity by SGC effect in the coupled quantum dots. Through the above researches, the present project will develop the application of SGC based on coupled quantum dots in the fields such as optical devices and quantum information, and push SGC from theoretics to applied technologies.

英文关键词： spontaneously generated coherence；double dark resonances；quantum interference；coupled quantum dots；tunneling induced transparency