Grupos de investigación

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  3. Seminars and Workshops

Seminars and Workshops

Recent Advances in Polarimetry at the AOCG

Speaker: Jesús del Hoyo

Date: 2026/jan/16

Place: Faculty of Physics

Abstract: Over the past eight years, we have participated in several research projects related to polarimetry. In this seminar, we present the main milestones achieved in this field of optics. First, the capabilities of the open-source software module py_pol will be introduced. Next, results in Mueller polarimetry will be presented, including the development of a high-precision Mueller polarimeter. Finally, recent advances in the characterization of polarizers and retarders for high-precision polarimetry will be discussed.

Links: Presentation,  video

 


Solving Maxwell Equations Using Polarimetry Alone

Speaker: Jorge Olmos Trigo (Universidad Complutense de Madrid)
Date; 2025/april/25
Place: Faculty of Physics
Abstract: Maxwell’s equations are solved when the amplitude and phase of the electromagnetic field are determined at all points in space. Generally, the Stokes parameters can only capture the amplitude and polarization state of the electromagnetic field in the radiation (far) zone. Therefore, the measurement of the Stokes parameters is generally insufficient to solve Maxwell’s equations. In this talk, I will show a route to solve Maxwell’s equations for a set of objects widely used in Nanophotonics using the Stokes parameters alone. These objects are lossless, axially symmetric, and well-described by a single multipolar order. This method for solving Maxwell’s equations endows the Stokes parameters an even more fundamental role in the electromagnetic scattering theory.

Metrics for comparison of image datasets and segmentation methods for fractal analysis of retinal vasculature

Speaker: Asmae Igalla (Universidad Complutense de Madrid)

Date: 2025/april/05

Place: Faculty of Optics and Optometry

Abstract: Fractal analysis of retinal vasculature is a key tool for characterizing pathologies and studying healthy retinas. Its accuracy depends on factors such as the fractal method employed, segmentation and image quality. In this talk I will present some metrics that we have developed to evaluate the influence of these factors, allowing us to quantify differences between methods and improve the criteria for their use in retinal diagnosis and characterization.


Diffractio 1.0.0 - Python package for diffraction and interferences

Speaker: Luis Miguel Sánchez Brea (Universidad Complutense de Madrid)

Date: 2025 / January / 25

Place: Faculty of Physics

Abstract: Diffractio (https://diffractio.readthedocs.io, https://pypi.org/project/diffractio/) is an open source package, written in Python, for the simulation of wave and vector optics. In this seminar we show the purpose of Diffractio, how it is used, the documentation developed for learning and several examples of use, both in research and teaching.

Link: https://drive.google.com/drive/u/3/folders/1CvKDYQVg4JCNXn5inXVv6PseMK-Se2aY