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
Whereas previous works focus on states located on the surface of these spheres, here we study vector and scalar modes lying inside the corresponding PS. We show that they can be obtained as the incoherent superposition of two orthogonal vector (or scalar) modes lying on the corresponding sphere surface. The degree of polarization (DoP) of a classical polarization state is thus extended to vector beams and OAM modes.
We used a q-plate to experimentally map any state in the polarization PS onto the HOPS, and a linear polarizer to finally project onto the OAMPS. We design a new polarization state generator, based on two geometric phase gratings and a randomly polarized laser, which generates partially polarized light in an efficient and controlled way.
Esther Nabadda received the best poster award at the Workshop on Structured Light and its Applications, organized by the Institute of Physics and the SPIE-OPTICA Student Chapter of the Friedrich Schiller University Jena – Link
Esther presented the poster entitled «Retrieving the phase distribution of structured light beams by a self-interferometric technique».
MarÃa del Mar Sánchez-López and Esther Nabadda have participated at the Workshop on Structured Light and its Applications organized by the Institute of Physics and the SPIE-OPTICA Student Chapter of the Friedrich Schiller University Jena – Link
MarÃa del Mar was one of the featured speakers with the talk entitled «Tailoring depolarization spatial effects with a liquid-crystal SLM».
Esther presented the poster entitled «Retrieving the phase distribution of structured light beams by a self-interferometric technique».
Ignacio Moreno appears included in the last update of the World’s Top 2% Scientists list (Ioannidis, 2022), a list made based on Elsevier Scopus data base – link.
This information has been covered in the article «Investigación de impacto mundial desde la UA y la UMH» at Diario Información – link (in Spanish).
A total of 37 researchers from UMH appear in the list. UMH news – link (in Spanish).
