摘要
纳米孔阵列的透射增强现象在许多领域都具有重要的应用和前景。采用时域有限差分(FDTD)方法对金属薄膜纳米孔阵列的透射增强特性进行了模拟研究。针对圆孔半径、薄膜厚度、阵列周期以及不同材料等因素进行了分析,讨论了不同参数条件下透射增强谱线的变化规律。研究表明大的圆孔半径和薄的薄膜厚度有利于提高透射性能,另外孔阵列周期较大时不利于增强透射。探讨了不同小孔形状对透射增强的影响,并采用矩形孔阵列进行了对比。最后通过改变薄膜材料计算了相应的透射性能。
Transmission enhancement of nanohole array has very important applications and prospects in many fields. Numerical simulation on transmission enhancement of metallic nanohole array is performed with finite- difference time-domain （FDTD） method. The factors such as round hole radius, film thickness, array cycle, and different materials are analyzed, and changing trend of transmission enhancement spectrum is discussed under the conditions of different parameters. Studies show that large round hole radius and thin film are helpful to the improvement of transmission enhancement, and larger hole array cycle is not conducive to transmission enhancement. The effect of different shape of nanohole on transmission enhancement is discussed, and rectangular hole array is used for comparison. Finally by changing thin film material the corresponding transmission performance is calculated.
出处
《激光与光电子学进展》
CSCD
北大核心
2014年第3期189-194,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11075026)
关键词
薄膜
透射增强
表面等离子体
纳米孔阵列
时域有限差分
thin films
transmission enhancement
surface plasmons
nanohole array
finite-difference time-domain
