金属-有机-金属电激发表面等离激元器件  

Electrically-Pumped Metal-Organic-Metal Plasmonic Emitter

作　　者：李宏强[1] 王冲[1] 

机构地区：[1]北京大学物理学院介观物理国家重点实验室,北京100871

出　　处：《北京大学学报（自然科学版）》2013年第2期171-175,共5页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金(11174018)资助

摘　　要：在p型硅衬底上,制备了金属有机金属(metal-organic-metal,MOM)电激发表面等离激元器件。器件结构是p-Si/Au/V2O5/NPB/Alq3:DCM/Sm/Au,掺杂DCM的Alq3为发光层。高倍显微镜下,器件侧面发光图像显示,绝大部分光被限制在双金层结构波导中传播。采用微区共焦拉曼光谱仪,分别测量了侧面出射的非偏振模式、TM模式和TE模式电致发光谱。TM模式强度约为TE模式强度的2倍。分析认为,具有TM偏振特性的表面等离激元(surface plasmon polariton,SPP)在侧面电致发光中起重要作用。发光体的能量耗散谱表明SPP模式能量约占总能量65%。利用时域有限差分法(finite-different time-domain,FDTD)对简化结构进行模拟,得到了泄漏模和SPP模式的二维电场强度分布。A metal-organic-metal （MOM） plasmonic emitter with the p-type Si substrate and the active layer of Alq3： DCM is reported. The device structure is p-Si/Au/V2O/NPB/Alq3：DCM/Sm/Au. The optical image of edge emission indicates that most of the light is well confined to the MOM waveguide. Light is collected with a confocal u-Raman spectrometer. The TM mode is more intense than the TE mode by a factor of 2, which can be attributed to the contribution of surface plasmon polariton （SPP）. The power dissipation spectrum is computed based on a simplified MOM structure of Au/organic/Au. By integrating the power of the SPP modes in the spectrum, the fraction of the total power coupled to SPP modes is 65%. The electric-field-intensity distribution and the loss coefficients are computed by finite-different time-domain （FDTD） method.

关 键 词：硅基光子学 有机发光二极管 表面等离激元 金属-有机-金属 

分 类 号：TN25[电子电信—物理电子学]