A special section on Spatial Light Modulators (SLMs) – Devices and Applications will be published in the journal Optical Engineering. Ignacio Moreno and María Del Mar Sanchez-Lopez are Guest Editors of this special section of the journal, together with Prof. Andrew Forbes and Prof. Yoshio Hayasaky.
The following link leads to the journal Call for Papers.
The deadline for submitting papers is September 15th, 2019. See here the flyer of the OE special section on SLMs.
María del Mar Sánchez-López visited the Group of Optics of the University Jaume I de Castellón (GROC-UJI) to participate as a member of the jury of the Doctoral Thesis of Yessenia Jauregui Sanchez, supervised by Prof. Jesús Lancis and Prof. Enrique Tajahuerce.
Excellent work on single-pixel cameras and imaging through scattering media!
Here you can see Ignacio Moreno’s talk about Optics & Photonics at the Day of Light, the workshop organized by COSCE – the Confederation of Spanish Scientific Societies on June 6th, 2019.
You can access the complete workshop at the following link
COSCE – the Confederation of Spanish Scientific Societies organized in June 6th a workshop to commemorate the Day of Light. Ignacio Moreno participated as President of SEDOPTICA, the Spanish Society of Optics. More information at: link
In the next video you can see a report recorded by UNED – the Spanish National University of Distance Education, which has bee broadcast at TVE2.
In his talk entitled “Two-dimensional geometric phase vortex grating based on the optimal triplicator design”, David presented the design and characterization of a liquid-crystal geometric phase diffraction grating that generates 3×3 diffraction orders with vortex beams of different topological charges, and showed the operation of this grating as a vortex detector. These results have recently been published in Optics Express: link to the paper.
Julio César presented a poster entitled “Hybrid vector beams generated by cascaded q-plates” where he demonstrated a q-plate-based optical system capable of generating a variety of hybrid vector beams, and showed the rotation of their polarization pattern when comparing the near field and the far field captures. This optical system is more compact than those based on SLMs whilst bearing a notable degree of versatility.
They have enjoyed the interesting conferences, scientific discussions and networking opportunities of this conference hosted by the OSA student chapter at ICFO and backed by the International OSA Network of Students. Link to the conference.
Experimental results are included with a display showing 10π phase modulation reducing the Nyquist limit by a factor of about 1/10. We used a Hamamatsu reflective LCoS device designed for use in the near infra-red (NIR) range, but operated with visible light in order to achieve such large modulation regimes.
The work has been done in collaboration with our friends at the Department of Physics of San Diego State University.
One day after the International Day of Light, Dr. Carlos Hernandez Garcia from USAL gave a seminar at TecnOPTO about Ultrafast Structured Laser Pulses – Extreme-Ultraviolet Vortex Beams Carrying Spin and Orbital Angular Momentum.
A great talk and a great discussion after the talk.
In May 16th 2019, we celebrated the International Day of Light. We had the visit of Dr. Carlos Hernández García, from the Research Group in Applications of Laser and Photonics Applications (ALF-USAL) of the University of Salamanca, a recognized expert in the generation of ultra-fast structured laser pulses
He imparted an excellent talk entitled Sculpting laser pulses, where he explained the Nobel Prize in Physics 2018, awarded to Arthur Ashkin, Gérard Mourou and Donna Strickland for their breakthroughs in laser physics. The talk can be viewed on line at the followinglink.
This conference was organized by the Local Section of Alicante of the Royal Spanish Physics Society (RSEF), in collaboration with the Department of Physics, the Institute of Bioengineering and the Polytechnical School of UMH, and was attended by over 80 students and faculty members.
We were also supported by SPIE, that provided Women in Optics agendas!
We published a new paper in Optics Express entitled Optimal triplicator design applied to a geometric phase vortex grating. It shows a liquid-crystal diffraction grating based on the optimal triplicator design fabricated as a geometric phase element. We analyze the polarization properties of this special diffraction grating and then use embedded spiral phases to design geometric phase vortex diffraction gratings. The fabrication of a two-dimensional version of such a design is demonstrated using a micro-patterned half-wave retarder, where the phase distribution is encoded as the orientation of the fast axis of the retarder.
This proof-of-concept element is made of liquid crystal on BK7 substrate where the orientation of the LC is controlled via photoalignment, using a commercially available fabrication facility. Experimental results demonstrate the parallel generation of vortex beams with different topological charge and different states of polarization.
This work is part of the PhD Thesis of David Marco, and it has been done in collaboration with our friends Aarón Cofré and Asticio Vargas, from Universidad de La Frontera, Temuco, Chile.
