Xinke Wang, Zhen Wu, Yan Zhang,
https://ieeexplore.ieee.org/document/8510365
As a kind of special beams, Bessel beams are always a research hot spot in optics due to its non-diffractive and self-healing properties. Here, a zero-order terahertz (THz) Bessel beam is generated by using a Teflon axicon. By applying a THz focal-plane imaging system, the evolutions of the transverse and longitudinal electric fields are coherently measured and analyzed during the propagation process of the THz Bessel beam. The work provides a comprehensive view for exactly understanding peculiar features of a THz Bessel beam.
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