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.
Custom waveplates enable patterned polarization control at the specific point of the laser beam.
Converts linear polarization to radial or azimuthal polarization and circular polarization to an optical vortex
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