不对称双量子点系统中电压调控电磁诱导光栅研究  

Voltage Control of Electromagnetically Induced Grating in Asymmetric Double Quantum Dot System

作　　者：郭洪菊[1] 陈辰[1] 杨艾红 Guo Hongju;Chen Chen;Yang Aihong(Department of Information and Intelligent Engineering,Shanghai Publishing and Printing College,Shanghai 200093,China;College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]上海出版印刷高等专科学校信息与智能工程系,上海200093 [2]山东科技大学电气与自动化工程学院,山东青岛266590

出　　处：《激光与光电子学进展》2021年第23期28-34,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11774235,61875125)。

摘　　要：在不对称双量子点系统内,基于半导体量子相干效应对电压隧穿诱导光栅进行了研究。利用该系统内的电压隧穿效应,可以在两个不同的探测失谐位置处同时诱导出电磁感应透明,在此基础上通过调节相关参数改变吸收性质,弱吸收条件下的相位光栅强度尤其是一阶衍射强度在特定探测失谐位置处得到了增强。研究了隧穿电压、泵浦场强度、相互作用长度等参数对相位光栅效率的影响,结果显示,当同时增加泵浦场强度及电压隧穿率时,相位光栅的一阶衍射效率提高了50%左右。研究结果在量子信息处理、量子网络及光学成像等领域有潜在的应用价值。Voltage control of electromagnetically induced grating is studied in an asymmetric double quantum dot system by use of quantum coherence in semiconductors.Owing to voltage tunneling effect,electromagnetically induced transparency can appear synchronously at two different frequency windows.By suitably tuning related parameters,the absorption property can be significantly modified.Therefore the intensity of a phase grating,especially its first-order diffraction intensity,can be enhanced significantly for a certain probe detuning with weak absorption.The influences of tunneling voltage,intensity of the pump field,interaction length and others on the efficiency of phase grating are investigated and the results show that the firstorder diffraction efficiency of the phase grating is enhanced by 50% by simultaneously increasing the voltage tunneling rate and intensity of pump field.The results have potential applications in quantum information processing,quantum networks and optical imaging.

关 键 词：光栅 隧穿诱导光栅 一阶衍射效率 电压隧穿效应 半导体量子相干效应 弱吸收 

分 类 号：O437[机械工程—光学工程]