8.5um量子阱红外探测器的光学天线优化
发布时间：2019-02-09 13:55
【摘要】：自上世纪90年代以来,量子阱红外探测器作为一个探索方向,成为探测领域的一个新兴研究热点,相对于传统的红外探测器。通过改变材料组分、调节量子阱指标-阱深、势垒高度,QWIP实现对目标波长的探测。但由于同导带(或价带)内不同子带间的跃迁与光极化方向密切相关,QWIP对光的入射方向要求苛刻,研究的一个方向在于将更多的入射光耦合进量子阱。自QWIP诞生以来,各种耦合方式被提出。本文中提出一种二维光学天线耦合方式,将远场能量有效的耦合到量子阱感光区域,提高QWIP的探测效率。该光学天线是一种基于表面等离子共振(SPR)的金属薄膜,利用薄膜上的周期孔列实现入射光对金属表面电子激发共振,增强局域电场。光学天线的各项指标尺寸与探测波长位于同一数量级,FDTD计算方法适合这一模型,故本文使用FDTD Solution对提出的光学天线性能进行仿真,优化二维光学天线的各项结构参数,实现探测中心波长为8.5um的最佳光学天线。
[Abstract]:Since the 1990s, the quantum well infrared detector has become a new research hotspot in the field of exploration as a direction of exploration, compared with the traditional infrared detector. By changing the composition of the material and adjusting the well depth and barrier height, the target wavelength can be detected by QWIP. However, the transition between different subbands in the homoconductive band (or valence band) is closely related to the direction of optical polarization, and the direction of incident light is demanding by QWIP. One direction of study is to couple more incident light into quantum wells. Since the birth of QWIP, various coupling methods have been proposed. In this paper, a two-dimensional optical antenna coupling method is proposed. The far-field energy is effectively coupled to the sensitive region of the quantum well to improve the detection efficiency of QWIP. The optical antenna is a kind of metal film based on surface plasmon resonance (SPR). The incident light is used to excite the electron resonance on the metal surface using periodic holes in the film and the local electric field is enhanced. Each index size of the optical antenna is in the same order of magnitude as the detection wavelength, and the FDTD calculation method is suitable for this model. Therefore, the performance of the proposed optical antenna is simulated by FDTD Solution in this paper, and the structural parameters of the two-dimensional optical antenna are optimized. The optimal optical antenna with the detection center wavelength of 8.5um is realized.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN215
本文编号：2419022
[Abstract]:Since the 1990s, the quantum well infrared detector has become a new research hotspot in the field of exploration as a direction of exploration, compared with the traditional infrared detector. By changing the composition of the material and adjusting the well depth and barrier height, the target wavelength can be detected by QWIP. However, the transition between different subbands in the homoconductive band (or valence band) is closely related to the direction of optical polarization, and the direction of incident light is demanding by QWIP. One direction of study is to couple more incident light into quantum wells. Since the birth of QWIP, various coupling methods have been proposed. In this paper, a two-dimensional optical antenna coupling method is proposed. The far-field energy is effectively coupled to the sensitive region of the quantum well to improve the detection efficiency of QWIP. The optical antenna is a kind of metal film based on surface plasmon resonance (SPR). The incident light is used to excite the electron resonance on the metal surface using periodic holes in the film and the local electric field is enhanced. Each index size of the optical antenna is in the same order of magnitude as the detection wavelength, and the FDTD calculation method is suitable for this model. Therefore, the performance of the proposed optical antenna is simulated by FDTD Solution in this paper, and the structural parameters of the two-dimensional optical antenna are optimized. The optimal optical antenna with the detection center wavelength of 8.5um is realized.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN215
【参考文献】
相关期刊论文 前1条
1 赵昆;杨希峰;;AlGaAs/GaAs量子阱探测器的吸收光谱研究[J];红外;2013年07期
，本文编号：2419022
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