Main Page » News »

Condensed Phase Physics Seminar, December 9, 2021

Liu, Yachao, et al. "Generation of perfect vortex and vector beams based on Pancharatnam-Berry phase elements." Scientific reports 7.1 (2017): 1-8.  DOI: 10.1038/srep44096

The Faculty of Physics of the Warsaw University of Technology invites you to the Condensed Phase Physics Seminar, where Dr. Krzysztof Świtkowski will deliver a speech on "Structured terahertz radiation".
The seminar will be held on Thursday, December 9, 2021 at 12:15 pm at the Auditorium of Physics.


Structured light is a dynamically developing field of optics. Mainly in this field, optical beams with phase singularities are considered. Among such beams, due to their application potential, the bundles of optical vortices (optical vortex beams) seem to be the most promising at present.

Such optical beams can have orbital angular momentum and can be transferred to small material objects e.g. in optical particle trapping.

In addition, vector vortex beams (beams with radial or azimuthal polarization) can be focused to sizes slightly smaller than those limited, so-called diffraction limit. This phenomenon relates to the subject of research carried out as part of the FNP Homing Project, "Terahertz structured beams for material diagnostics and microscopy. In the project, the current knowledge of structured light is applied in the terahertz spectral range of electromagnetic waves. The main goal of the project is to generate terahertz vortex beams and use them to improve the spatial resolution of terahertz scanners and in terahertz microscopy. The paper will present the basic issues related to vortex beams, the terahertz technique and information on the research conducted as part of the project.

We cordially invite all members of the Faculty's community: employees, doctoral students and students.