光栅耦合的可集成表面等离子体激射装置  

Integrated device of lasing SPPs with coupling grating

作　　者：朱君[1] 李志全[1] 

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004

出　　处：《光学精密工程》2012年第9期1899-1903,共5页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.60877047);河北省自然科学基金资助项目(No.F20100002002);国家留学人员科技活动择优资助项目(No.20070216004)

摘　　要：为了能够更有效地调节和产生表面等离子体激元(Surface Plasmon Polaritons,SPPs)的激射,设计了一种光栅耦合的可集成SPPs激射装置,利用电子束激发和光栅耦合方式实现了SPPs在无源金属层中的传播和激射。分析了该装置SPPs传播的波矢特性,通过某一条件下激射条件和光照波长的分析得出了结构的一般特性。结果表明:基于光栅耦合结构的装置产生的SPPs激射具有显著的强局域特性,通过控制注入电子束强度可有效调节SPPs的激射,该装置可在光照波长710nm左右的可见光范围实现有效的SPPs传播。该装置的研制对于构建等离子体单元电路,探测纳米线结构和纳米级飞秒光学场极有意义。To control the lasing of Surface Plasmon Polaritons （SPPs） more effectively, an integrated device of lasing SPPs based on a coupling grating was researched and the propagation and lasing of the SPPs in passive metal layers were realized by electron beam exciting and grating coupling. The charac- teristics of wave vector for the SPPs propagation were analyzed and the general characteristics of the device were obtained through the analysis of lasing condition and light wavelength under a special con- dition. Results indicate that the device to complete the SPPs lasing based on the coupling grating has an obvious strong local characteristics, and it can control the lasing SPPs effectively by adjusting the intensity of injecting electron beam. The device can propagate the SPPs well when it is in the range of visible light wavelength. The device has a positive significance for researching the construction of plasmon cell circuit, the detection of nano-wire structure and the explosion of nano-optical field.

关 键 词：等离子体物理学 表面等离子体激元 光栅耦合 强局域化 

分 类 号：O539[理学—等离子体物理] TN252[理学—物理]