基于表面等离子激元的自由空间广角接收机研究  

Wide Field-of-View Free-space Optical Receiver based on Surface Plasmon Polaritons

作　　者：蔡琳[1] 李光元[1] 徐安士[1] 

机构地区：[1]区域光纤通信网与新型光通信系统国家重点实验室,信息科学技术学院电子学系,北京大学,北京100871

出　　处：《China Communications》2009年第3期53-59,76,共8页中国通信（英文版）

基　　金：国家自然科学基金项目(编号:60772002);高等教育博士后基金项目(编号:200800010037)的资助

摘　　要：广角光接收机能够接收来自空间各个方向的信号光,大大降低了自由空间光通信系统对准、跟踪和捕获的复杂度,在未来无线光通信系统中有着广阔的应用前景。然而,当它采用传统光器件来实现时,其视场角会受到各种制约而很难扩展。本文提出采用表面等离子激元的方法来实现空间光的广角接收,并提出了一种等离激元波纹喇叭结构,它能突破衍射极限,打破传统器件的种种制约,并且能在相对较宽的角度范围内获得较强的增益。我们对相关的原理和设计方法都做了详细的讨论。Wide field-of-view （FOV） free-space receivers are promising for optical wireless communications, which can reduce the requirements on aiming and tracking. However, the FOV is limited by some tradeoffs of the receiver＇s components employing conventional optical devices. In this paper, we proposed a wide FOV optical receiver based on the extraordinary optical transmission mechanism of surface plasmons on a dielectric-metal interface. The proposed receiver has a fiat response over a relative wide range of incidence angles. Moreover, the received optical energy density has been enhanced greatly compared to the incidence. Related mechanisms as well as the optimization method are investigated. Potential applications are also discussed.

关 键 词：广角 空间光接收机 表面等离子激元 

分 类 号：TN249[电子电信—物理电子学]