Generation of Broadband THz Airy Beams Applying 3D Printing Technique

Non-diffraction beams like Airy beams have been widely explored in various disciplines owing to its fascinating features. A broadband generator for THz Airy beam operating from 90 to 110 GHz is investigated in this work. It is composed of three lenses and fabricated by 3D printing technique using polymer. Experimental characterization is conducted to validate the effectiveness of the fabricated Airy beam generator. Obvious curved propagation trajectory of the Airy beam is observed in the operation bandwidth, implying successful generation of the broadband Airy beam. Potential applications like broadband THz wave manipulation and imaging can be developed based on the proposed technique.