We have participated in the Annual Meeting of the European Optical Society, EOSAM2023, held in Dijon (France) in September 11-15th, 2023.
David Marco delivered the talk entitled «Mapping partially polarized light to incoherent superpositions of vector beams and vortex beams with orbital angular momentum», where he presented our recent article published in Journal of Optics.
Esther Nabadda gave the talk «Complete Mueller matrix imaging polarimeter for evaluating optical components for structured light», where she presented our new imaging polarimeter system.
Finally, Ignacio Moreno participated in the event as the new EOS Secretary of the Board of Directors, and as co-chair of the Focus Session on Structured Light.
In this work the indices of polarimetric purity (IPP) are analyzed as metrics to study the depolarization characteristic of media. It shows two different depolarizing origins: isotropic and anisotropic depolarization. The former, isotropic depolarization is related to pure scattering processes. Anisotropic depolarization is originated by microscopic constituent elements showing polarimetric anisotropy (dichroic and/or birefringent elements with different characteristics) and anisotropic scattering produced by these elements.
TecnOpto contributed to the experimental validation with radial polarizer and radial retarder measured with a Mueller matrix imaging polarimeter.
This work presents a novel optical system for polarization image processing using geometric-phase (Pancharatnam-Berry) lenses. These lenses present the same focal length but opposite sign for left and right circular polarizations. Therefore, they split an input collimated beam in a converging beam and a diverging beam with opposite circular polarizations. Here we profit from these properties to build an optical Fourier filter system with polarization sensitivity. A telescopic system is used to have access to two real Fourier transform planes, one for each circular polarization. A second symmetric optical system is used to recombine the two beams onto a single final image. As a result, polarization sensitive optical Fourier filtering can be applied, as demonstrated with simple bandpass filters.
On February 27th, 2023 we had the visit of Prof. Elisabet Perez, from the Facultat d’Ã’ptica i Optometria de Terrassa (FOOT), at Universitat Politècnica de Catalunya (UPC).
In this work we present a new method to generate vector beams with a 4f polarization Fourier filtering system that combines a spatial light modulator (SLM) at the input plane and a geometric phase polarization diffraction grating (PDG) at the output plane. This new systems presents advantages in terms of light efficiency and flexibility compared to other previous approaches.
The work has been done in collaboration with Prof. Jeffrey A. Davis and Prof. Don M. Cottrell from the Department of Physics at San Diego State University.
Ignacio Moreno attended SPIE Photonics West 2023 held in San Francisco from January 28th to February 2nd.
He participated in the SPIE conference Complex Light and Optical Forces XVII, where he delivered the presentation «Polarization state generator for the generation of complex light with controllable degree of polarization».
She holds a degree in Physics, a degree in Computer Application Software both from Yanbian University (China), and a Master in Photonics Engineering from University Carlos III of Madrid (Spain).
She has enrolled the PhD Program on Bioengineering at IB-UMH to pursue her doctoral thesis in our lab.
A Fourier transform optical setup is converted into a polarization common-path interferometer by simply rotating a polarizer. Then, this configuration allows a phase-shifting interferometry algorithm to be applied to retrieve the phase of the diffraction orders.
The paper has been highlighted as Editor’s pick.
This work is part of PhD Thesis of Esther Nabadda.
On November 28th, 2022, we had the visit of Prof. Eugenio Roldán, from the University of Valencia.
Prof. Roldán participated in the event DIVULGA-NOBEL 2002, where he presented the talk «TeorÃa cuántica: Tres pies al gato», where he explained the 2022 Nobel Prize in Physics awarded to Alain Aspect, John F. Clauser and Anton Zeilinger.
If you missed this excellent presentation by Prof. Roldán, you can now view it in the following link
We have participated in the Annual Meeting of the European Optical Society, EOSAM2023, held in Dijon (France) in September 11-15th, 2023.
