TY - GEN
T1 - A spiral phase plate prepared via high-resolution 3D printing for THz vortex beam generation
AU - Paraipan, Andreea Aura
AU - Reddy, Innem V.A.K.
AU - Balistreri, Giacomo
AU - Zanotto, Luca
AU - Gonzales-Hernandez, Diana
AU - Shalaby, Mostafa
AU - Morandotti, Roberto
AU - Liberale, Carlo
AU - Razzari, Luca
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Three-dimensional (3D) printing technologies have recently been used for the fabrication of custom optical components in the terahertz (THz) range, with benefits related with flexible design, fast prototyping, and preparation of on-demand devices. However, standard 3D printing methods have a limited spatial resolution (∼ 100 μm, typically allowing the fabrication of components with the necessary precision only for frequencies of a few hundred GHz. The advanced 3D printing method based on two-photon polymerization (TPP) can instead give access to nanoscale resolutions (< 100 nm). Here, we employ this technique to fabricate a spiral phase plate (SPP, i.e., a device that can convert a Gaussian beam into a vortex beam with a helical phase) operating at around 1 THz. Using our recently developed scanless THz time-domain imaging (TDI) method, we experimentally retrieve hyperspectral information about both the amplitude and phase of the generated vortex beam, which is found to agree with the results of our numerical simulations.
AB - Three-dimensional (3D) printing technologies have recently been used for the fabrication of custom optical components in the terahertz (THz) range, with benefits related with flexible design, fast prototyping, and preparation of on-demand devices. However, standard 3D printing methods have a limited spatial resolution (∼ 100 μm, typically allowing the fabrication of components with the necessary precision only for frequencies of a few hundred GHz. The advanced 3D printing method based on two-photon polymerization (TPP) can instead give access to nanoscale resolutions (< 100 nm). Here, we employ this technique to fabricate a spiral phase plate (SPP, i.e., a device that can convert a Gaussian beam into a vortex beam with a helical phase) operating at around 1 THz. Using our recently developed scanless THz time-domain imaging (TDI) method, we experimentally retrieve hyperspectral information about both the amplitude and phase of the generated vortex beam, which is found to agree with the results of our numerical simulations.
UR - http://www.scopus.com/inward/record.url?scp=85177645060&partnerID=8YFLogxK
U2 - 10.1109/IRMMW-THz57677.2023.10299379
DO - 10.1109/IRMMW-THz57677.2023.10299379
M3 - Conference contribution
AN - SCOPUS:85177645060
T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
BT - IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves
PB - IEEE Computer Society
T2 - 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Y2 - 17 September 2023 through 22 September 2023
ER -