| 微型腔单一亚波长金属狭缝的光波透射 |
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| 引用本文： | 肖星星,唐延林,张荣涛,陈跃刚.微型腔单一亚波长金属狭缝的光波透射[J].强激光与粒子束,2009,21(11). |
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| 作者姓名： | 肖星星 唐延林 张荣涛 陈跃刚 |
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| 作者单位： | 贵州大学 贵州省光电子技术与应用重点实验室, 贵阳 550025 |
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| 基金项目： | 贵州省自然科学基金项目，贵州大学基金项目( |
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| 摘 要： | 利用时域有限差分法模拟了厚金属层上单一亚波长狭缝内壁刻有一微型腔结构光波传输，结果发现在特定波长发生异常的增强透射。结合透射峰值对应波长近场分布，利用麦克斯韦方程组和波导理论对增强透射进行解释，认为光波在微型腔和狭缝中形成共振腔模起了重要作用:在狭缝内形成纵模，可以形成透射峰；在腔内形成不同的腔模也可以形成透射模。
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| 关 键 词： | 亚波长金属结构 增强透射 局域表面等离子体 波导共振 |
| 收稿时间： | 1900-01-01; |
Optical wave transmission through single cavity-groovedsubwavelength slit in thick metallic plate |
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| Xiao Xingxing,Tang Yanlin,Zhang Rongtao,Chen Yuegang.Optical wave transmission through single cavity-groovedsubwavelength slit in thick metallic plate[J].High Power Laser and Particle Beams,2009,21(11). |
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| Authors: | Xiao Xingxing Tang Yanlin Zhang Rongtao Chen Yuegang |
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| Institution: | Key Laboratory of Photoelectron Technology and Application, Guizhou University, Guiyang 550025, China |
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| Abstract: | Optical wave transmission through a subwavelength slit grooved with cavity in internal wall is investigated in a thick metallic plate by two-dimensional finite-difference time-domain method, and enhanced transmissions are found at some wavelengths in transmission spectra. Using Maxwell equations and waveguide resonance theory, the mechanism of the enhanced transmission is explored with amplitude distributions. It is considered that waveguide resonance modes play an important role in the transmission. The longitudinal modes forming in the subwavelength slit can lead to transmission peaks, and so can the cavity modes. |
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| Keywords: | subwavelength metallic structure enhanced transmissions localized surface plasmon polaritons waveguide resonance |
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