Related Experiment Video
Updated: Aug 15, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Characterization of near-field terahertz wavefronts using a 3D-printed Shack-Hartmann lens array
Optics Express
|August 14, 2026
Summary
Researchers developed an affordable 3D-printed Shack-Hartmann wavefront sensor (SHWS) for characterizing terahertz (THz) near-field wavefronts. This innovation enables the study of engineered beams crucial for future wireless communication systems.
Area of Science:
- Electromagnetics and Optics
- Wireless Communications Engineering
- Additive Manufacturing
Background:
- Future wireless communication systems are moving towards higher frequencies, including terahertz (THz) bands.
- Characterizing engineered wavefronts in the near-field of antenna apertures is crucial for these systems.
- Traditional Shack-Hartmann wavefront sensors (SHWS) are costly and less utilized at lower THz frequencies due to wavelength-dependent device size.
Purpose of the Study:
- To introduce an inexpensive and accessible method for characterizing near-field wavefronts in the sub-terahertz (sub-THz) and THz spectral regimes.
- To demonstrate the fabrication of a functional SHWS using additive manufacturing (3D printing) for THz applications.
- To experimentally validate the characterization of novel wavefronts relevant to future wireless networks.
Main Methods:
- Leveraging additive manufacturing (3D printing) to create a cost-effective Shack-Hartmann wavefront sensor (SHWS).
- Designing and fabricating a SHWS specifically for operation at 0.2 THz.
- Utilizing the fabricated SHWS to experimentally characterize three distinct near-field wavefronts: Gaussian, Airy beam, and tilted focused Gaussian (TFG).
- Performing full-wave simulations to complement experimental results.
Main Results:
- Successfully fabricated an inexpensive, functional SHWS for THz frequencies using 3D printing.
- Demonstrated the capability of the 3D-printed SHWS to characterize engineered near-field wavefronts at 0.2 THz.
- Provided experimental data and simulations for Gaussian, Airy, and TFG beams in the THz near-field.
Conclusions:
- Additive manufacturing offers a viable and cost-effective solution for producing SHWS for THz applications.
- The developed SHWS is effective for characterizing complex near-field wavefronts essential for future wireless communications.
- This work pioneers the experimental study of THz near-field wavefronts, including Airy and TFG beams.
