A spiral phase plate prepared via high-resolution 3D printing for THz vortex beam generation

Andreea Aura Paraipan*, Innem V.A.K. Reddy, Giacomo Balistreri, Luca Zanotto, Diana Gonzales-Hernandez, Mostafa Shalaby, Roberto Morandotti, Carlo Liberale, Luca Razzari

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish (US)
Title of host publicationIRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves
PublisherIEEE Computer Society
ISBN (Electronic)9798350336603
DOIs
StatePublished - 2023
Event48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 - Montreal, Canada
Duration: Sep 17 2023Sep 22 2023

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Country/TerritoryCanada
CityMontreal
Period09/17/2309/22/23

Bibliographical note

Publisher Copyright:
© 2023 IEEE.

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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