| 双金属纳米天线在少周期激光中的宽带超快电磁响应 |
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| 引用本文： | 杨盈莹,张永亮,赵震声,段宣明.双金属纳米天线在少周期激光中的宽带超快电磁响应[J].物理学报,2012,61(1):14207-014207. |
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| 作者姓名： | 杨盈莹 张永亮 赵震声 段宣明 |
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| 作者单位： | 1. 中国科学院理化技术研究所, 中国科学院功能晶体与激光技术重点实验室, 北京 100190;
2. 中国科学院研究生院, 北京 100190 |
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| 基金项目： | 国家重点基础研究发展计划 (批准号: 2010CB934103)、 国家自然科学基金(批准号: 61077028, 50973126)和 国家科技部国际合作项目 (批准号: 2008DA02050, 2010DFA01180) 资助的课题. |
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| 摘 要： | 研究了耦合的核壳双金属纳米粒子天线的光场增强与超快时域响应. 在少周期激光的应用中, 如表面等离激元金属纳米器件中的超快响应探测元件, 这种双金属天线展示了超宽带共振频谱及控制局域表面等离激元增强的能力. 研究了二聚体、三聚体以及七聚体, 并且发现三聚体Ag/Au核壳结构显现了极高的场增强能力, 其场振幅增强因子超过了120, 并在5 fs的时间内场振幅迅速衰减为30, 保持了超快的光学响应特性. 利用该结构的表面等离激元增强效应产生高次谐波, 对于产生超快阿秒脉冲有着潜在的重要应用价值.
关键词：
纳米光学天线
双金属球壳结构
少周期激光脉冲
表面等离激元
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| 关 键 词： | 纳米光学天线 双金属球壳结构 少周期激光脉冲 表面等离激元 |
| 收稿时间： | 2011-02-27 |
Broad-bandwidth and ultrafast electromagnetic response of coupled bimetal nanoantennas in few-cycle laser applications |
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| Yang Ying-Ying,Zhang Yong-Liang,Zhao Zhen-Sheng and Duan Xuan-Ming.Broad-bandwidth and ultrafast electromagnetic response of coupled bimetal nanoantennas in few-cycle laser applications[J].Acta Physica Sinica,2012,61(1):14207-014207. |
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| Authors: | Yang Ying-Ying Zhang Yong-Liang Zhao Zhen-Sheng and Duan Xuan-Ming |
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| Institution: | Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry,linebreak Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy Sciences, Beijing 100190, China;Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry,linebreak Chinese Academy of Sciences, Beijing 100190, China;Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry,linebreak Chinese Academy of Sciences, Beijing 100190, China;Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry,linebreak Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | We explore the field enhancement and temporal response of coupled bi-metal Ag/Au core-shell nanoparticle antennas. The bimetal antennas exhibit ultra-broadband resonances and allow exploiting the local field enhancement for few-cycle laser applications such as elements with an ultrafast response in nanoplasmonic device. We study dimer, trimer and heptamer arrangements and find that the Ag/Au core-shell trimer shows that a very high enhancement factor with an amplitude exceeds 120, but still facilitates an ultrafast response. Such systems may be ideal for the generation of attosecond light pulses based on high harmonic generation by employing nanoplasmonic field enhancement. |
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| Keywords: | optical nanoantennas bimetal core-shell structures few-cycle laser pulse surface plasmon |
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