Welcome
The Wavefront Engineering Group is a research unit within the Department of Applied Physics, Universitat de Barcelona. We are a small group of six people working in imaging and physical optics problems:
- Our main target is the design, experimental implementation and characterization of highly focused electromagnetic fields in the focal area. We have developed a notable expertise manipulating the complex amplitude and polarization of light using computer-generated holograms displayed on spatial light modulators.
- Counterfeit detection of optical codes and other optical security problems is also one of our priorities. On the one hand, we use machine learning techniques to authenticate optically encoded information with a high degree of confidence. On the other, we develop encryption systems using focused beams with elliptical polarization.
- The measure of polarization in low light conditions can be challenging. We analyze this issue using 3D integral imaging techniques.
We keep collaborations with:
- Prof. Bahram Javidi Lab (UConn, Multidimensional Optical Sensing and Imaging Systems (MOSIS) Laboratory )
- Prof. Rosario Martínez-Herrero Group, (UCM, Grupo de Haces Láser y Óptica Física)
News
2023
20 January 2023: Kavan Ahmadi's thesis defense
2022
14 October 2022: New paper [Optical security]
Optical visual encryption using focused beams and convolutional neural networks
1 October 2022: New paper [Thin films and electromagnetic optics]
Compact formulation of the transparent–absorbing isotropic interface electromagnetic problem
18-22 July 2022, V International Conference on Applications of Optics and Photonics (Guimarães, Portugal)
- 19 July: GUI-Based Phase Retrieval Algorithm for the Reconstruction of the Longitudinal Component of Electromagnetic Beams by M. Aviñoá
- 20 July: On the total estimation of the electromagnetic field in the focal area with no interaction with the media by D. Maluenda (Keynote)
- 20 July: Estimation of Zernike polynomials for a highly focused electromagnetic field using polarimetric mapping images and neural networks by K. Ahmadi
30 May 2022: New Tutorial [Thin films and electromagnetic optics]
Thin film optics computations in a high-level programming language environment: tutorial
20 May 2022: New Paper [3D imaging and holography].
Estimation of Degree of Polarization in low light using truncated Poisson distribution
2021
13 October 2021: New Paper [3D imaging and holography].
Roadmap on digital holography [Invited]
9 September 2021: New Paper [Focused fields].
Experimental estimation of the longitudinal component of a highly focused electromagnetic field
27 August 2021: New Paper [Education].
Multi-spectral imaging: a tool for the study of the area burned in wildfires
30 July 2021: New paper [Focused fields].
Efficient calculation of highly focused electromagnetic Schell-model beams
19 -23 July 2021: OSA Imaging and Applied Optics Congress (OSA Virtual Event).
- 21 July: 3D Degree of Polarization and its Fundamental Limits by M. Aviñoa
- 21 July: Fast Mapping of Double-Pixel Holograms using K-Nearest Neighbors by K. Ahmadi
8 April 2021: OPSI-IASBS colloquium,
5 April 2021: New paper [Other collaborations].
This work is licensed under a Creative Commons Attribution 4.0 International License.
Last Updated: 18 October 2022