Focusing of Modes for Metallic Resonator of a Terahertz Laser with Nonuniform Spatial Polarization

O. Gurin, A. Degtyarev, M. Dubinin, V. Maslov, K. Muntean, V. Ryabykh
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引用次数: 3

Abstract

Theoretically, based on the Rayleigh-Sommerfeld vector theory using the radiation of a waveguide terahertz laser (λ = 432.6 μm), physical features of moderate and sharp focusing of radiation beams were studied. Laser beams are excited by the modes of a laser cavity based on a circular metal waveguide for inhomogeneous spatial polarization of the field. It is shown that in the focal region of the lens, in the case of a moderate and sharp focusing of the radiation beam excited by the TM11 mode with a nonuniform polarization, a minimum of its axial intensity is observed. It is due to the significant influence in this case of the intensity of the longitudinal component of the field of the given mode. The obtained results expand the knowledge about the features of the focusing for the laser beams of terahertz range.
非均匀空间偏振太赫兹激光器金属谐振腔模式聚焦
理论上,基于Rayleigh-Sommerfeld矢量理论,研究了波导太赫兹激光器(λ = 432.6 μm)辐射光束中、锐聚焦的物理特性。激光束是由基于圆形金属波导的激光腔的模式激发的,其场的空间极化是非均匀的。结果表明,在透镜的焦点区域,当以非均匀偏振的TM11模式激发的辐射光束进行中等锐利聚焦时,其轴向强度最小。这是由于在这种情况下,给定模态的场的纵向分量的强度的显著影响。所得结果拓展了对太赫兹激光聚焦特性的认识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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