Liebert, K., Rachoń, M., Bomba, J., Sobczyk, A., Zagrajek, P., Sypek, M., Suszek, J. and Siemion, A. 2018. THz diffractive focusing structures for broadband application. Photonics Letters of Poland. 10, 3 (Oct. 2018), 76–78. DOI:https://doi.org/10.4302/plp.v10i3.845.