激光与光电子学进展, 2017, 54 (1): 012601, 网络出版: 2017-01-17
太赫兹贝塞尔谐振腔的设计与分析
Design and Analysis of Bessel Resonator at Terahertz Frequencies
物理光学 谐振腔 贝塞尔波束 贝塞尔高斯波束 迭代并矢格林函数算法 physical optics resonator Bessel beam Bessel-Gaussian beam iterative dyadic Green′s functions algorithm
摘要
在太赫兹频段, 基于准光理论与技术构建了3种类型的贝塞尔谐振腔, 即稳定贝塞尔高斯谐振腔、贝塞尔谐振腔、非稳定贝塞尔高斯谐振腔。为了严格分析腔内的衍射场分布特性, 通过边界元素法求解迭代并矢格林函数(IDGF), 并利用IDGF算法计算腔内的三维自再现模。分析比较3种类型的贝塞尔谐振腔的零阶模和高阶模特性, 给出比较结果。所实现的贝塞尔波束或贝塞尔高斯波束有望用于准光或太赫兹频段的通信、测量和成像等方面。
Abstract
At terahertz frequencies, three types of Bessel resonators, namely, a stable Bessel-Gauss resonator, a Bessel resonator, and an unstable Bessel-Gauss resonator, are built based on quasi-optical theory and technology. To strictly analyze the diffraction field distribution characteristics of the cavity, the boundary element method is used to calculate the iterative dyadic Green′s functions (IDGF), whose algorithm is then used to calculate the three-dimensional self-reconstructing model of the cavity. The zero order model and high order model of three types of Bessel resonators are compared and the results are given. The Bessel beam or Bessel-Gauss beam generated are expected be used in such fields as communications, measurement and imaging in quasi-optical or terahertz spectrum.
黄晗, 余燕忠. 太赫兹贝塞尔谐振腔的设计与分析[J]. 激光与光电子学进展, 2017, 54(1): 012601. Huang Han, Yu Yanzhong. Design and Analysis of Bessel Resonator at Terahertz Frequencies[J]. Laser & Optoelectronics Progress, 2017, 54(1): 012601.