| 表面等离子激元净放大的结构设计与理论分析 |
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| 引用本文： | 李文超,赵玲玲,李志全,朱君,童凯,王志斌.表面等离子激元净放大的结构设计与理论分析[J].红外与激光工程,2015,44(9):2684-2689. |
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| 作者姓名： | 李文超 赵玲玲 李志全 朱君 童凯 王志斌 |
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| 作者单位： | 1.东北大学秦皇岛分校 控制工程学院,河北 秦皇岛 066004; |
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| 基金项目： | 国家自然科学基金(61172044);广西自然科学基金(2015GXNSFBA139257);广西师范大学博士科研启动基金 |
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| 摘 要： | 连续波发生器的SPASER(Surface Plasmon Amplification by Stimulated Emission of Radiation)相当于净放大等于零,不能作为放大器使用,文中采用改进的MIM波导结构实现SPASER作为放大器可能性。利用汉密尔顿函数的理论模型得到了放大器激射条件,数值计算表明:采用改进的MIM波导结构实现解决SPASER的内反馈问题和消除SP的净增益问题是可行的;改进结构在不到100 fs的时间里实现了SP激子数的稳定水平;改进SPASER放大器响应时间为100 fs,带宽为1.5~2 THz,SP的放大增益在30~60 dB范围。上述研究成果将为大规模集成光子学芯片设计提供了理论和技术基础。
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| 关 键 词： | 表面等离子激元 金属-绝缘体-金属波导 双稳态放大 |
| 收稿时间： | 2015-01-17 |
Structural design and theoretical analysis of achieving the net gain of SPASER |
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| Affiliation: | 1.School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;2.College of Electrical Engineering,Yanshan University,Qinhuangdao 066004,China;3.College of Electronic Engineering,Guangxi Normal University,Guilin 541004,China |
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| Abstract: | An improved metal-insulator-metal(MIM) waveguide structure was used to realize the potential of surface plasmon amplification by stimulated emission of radiation(SPASER) as amplification, although a major problem is that the net gain of SPASER equals zero, which makes it unsuitable for amplification. With the use of a theoretical Hamiltonian model as basis, the lasing conditions were obtained. The numerical calculations of these conditions show that overcoming the inherent feedback and eliminating the surface plasmon(SP) net gain are feasible by using the improved MIM waveguide structure, which can achieve stable SP excitons in less than 100 fs. This study shows that the improved SPASER amplifies with a response time of 100 fs, a bandwidth of 1.5-2.0 THz, and an SP gain of 30-60 dB. SPASER amplifier research provides theoretical and technological foundation for large-scale integrated photonic chips. |
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