纳米等离子体中定位聚焦的时间反演控制  

Time Reversal Coherent Control for Positioning and Foucusing in Nanoplasma

作　　者：池黎明[1] 朱鹏飞[1] 李向亭[1] 

机构地区：[1]上海交通大学物理系光学与光子学研究所,上海200240

出　　处：《光学学报》2010年第8期2421-2426,共6页Acta Optica Sinica

基　　金：国家自然科学基金(10474063)资助课题

摘　　要：提出了时间反演方法来控制等离子纳米系统中能量最强点的位置。该方法是基于纳米系统中对某一点局域超短脉冲激发的远场的时间反演。尽管在金属等离子系统中存在很强烈的干扰和严重的相位移动和分散,并且所作的时间反演并不完整,但是该方法在控制纳米尺度的光场能量时十分有效,可应用于纳米分光镜、光学调制、超密信息存储和纳米信息处理等领域。An approach has been introduced called time reversal to coherently control the position in which the optical energy localizes in plasma nanosystems.This approach is based on the impulsive localized excitation of the nanosystem and time reversal of the generated far-zone field at a single point with one polarization.Despite strong interaction and significant dephasing and dissipation in metal plasma systems,and incompleteness of this time reversal,the proposed approach proves to be very efficient in controlling the nanoscale optical fields.The approach may be applied in nanoscales spectroscopy,optical modification,ultradensememory,and information processing on the nanoscale.

关 键 词：表面光学 纳米定位 时间反演 表面等离子体 

分 类 号：O485[理学—固体物理]