Lithuanian Journal of Physics article / Lietuvos fizikos žurnalo straipsnis

3D PRINTED DIFFRACTIVE LENSES OPERATING AT 1 THz
Paweł Komorowski^a, Mateusz Kaluza^b, Mateusz Surma^b, and Agnieszka Siemion^b
^aInstitute of Optoelectronics, Military University of Technology, 00908 Warsaw, Poland
^bFaculty of Physics, Warsaw University of Technology, 00662 Warsaw, Poland
Email: pawel.komorowski@wat.edu.pl

Received 17 September 2023; accepted 18 September 2023

In this paper, we demonstrate the manufacturing of diffractive optics for frequencies as high as 1 THz using a relatively simple and cost-effective fused deposition modelling (FDM) 3D printing technique. Four diffractive lenses were designed and manufactured from the cyclic olefin copolymer (COC). Fabrication of diffractive lenses for such high frequencies was possible due to an unusually small nozzle, refined printing procedures and a very transparent material. For the two of the manufactured lenses, more than twofold improvement in focusing efficiency has been shown in a direct comparison with their refractive counterparts. Moreover, the other two elements demonstrated the feasibility of lenses with very small f-numbers (0.95 and 0.63) with this technique.
Keywords: THz, 3D printing, optics, lenses, diffractive optical elements

3D SPAUSDINTI DIFRAKCINIAI LĘŠIAI 1 THz DAŽNIUI
Paweł Komorowski^a, Mateusz Kaluza^b, Mateusz Surma^b, Agnieszka Siemion^b

^aKaro technologijos universiteto Optoelektronikos institutas, Varšuva, Lenkija
^bVaršuvos technologijos universiteto Fizikos fakultetas, Varšuva, Lenkija

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