Diffractive Optical Elements For THz Frequencies

WOP offers diffractive optical elements for THz frequencies – various types of custom elements suitable for your specific THz wave manipulation applications.

The terahertz frequency range ranges from 0.1 THz to 10 THz in an emerging wide research field with multiple applications – from communication to optical imaging or spectroscopy.

Various materials such as semiconductors, metals, polymers, or plastics can be used as functional materials.

One of the key applications is THz optical imaging which enables seeing through transparent and opaque materials.

Ultra short pulse laser processing is used as a precise tool to manufacture diffractive and custom optical elements.


  • Prototype development
  • Ultra-high precision
  • High processing speed
  • Custom designed elements
  • Surface roughness below 2 µm
  • Various materials: metals, polymers, plastics, semiconductors


  • Prototype development
  • Ultra-high precision
  • High processing speed
  • Custom designed elements
  • Surface roughness <2 µm
  • Various materials
    metals, polymers, plastics, semiconductors

Precise material processing for THz applications

Diffractive optical element for THz frequencies, SEM photo

A diffractive optical element for THz frequencies, SEM photo

Structured light – electromagnetic waves with a strong spatial inhomogeneity of amplitude, phase, and polarization – has occupied far-reaching positions in both optical research and applications.

Terahertz (THz) waves, due to recent innovations in photonics and nanotechnology, became so robust that it was not only implemented in a wide variety of applications such as communications, spectroscopic analysis, and non-destructive imaging but also served as a low-cost and easily implementable experimental platform for novel concept illustration.

The structured THz illumination consistently outperforms the conventional one in resolution and contrast, thus opening new frontiers of structured light applications in imaging and inverse scattering problems, as it enables sophisticated estimates of the optical properties of the investigated structures 1.


  1. Orlov, S., Ivaškevičiūtė‐Povilauskienė, R., Mundrys, K., Kizevičius, P., Nacius, E., Jokubauskis, D., … & Valušis, G. (2024). Light Engineering and Silicon Diffractive Optics Assisted Nonparaxial Terahertz Imaging. Laser & Photonics Reviews, 2301197. https://doi.org/10.1002/lpor.202470028
  2. Ivaškevičiūtė-Povilauskienė, R., Kizevičius, P., Nacius, E. et al. Terahertz structured light: nonparaxial Airy imaging using silicon diffractive optics. Light Sci Appl 11, 326 (2022). https://doi.org/10.1038/s41377-022-01007-z
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